| Title | Host | Airdate | Description | Catalog Info | |
|---|---|---|---|---|---|
| Concentration (Original) | Hugh Downs | 1958 | Walter vs. Robert | A-/Kine OC/TA-1 | |
| Concentration (Original) | Hugh Downs | 1959 | Art James guest hosts - beginning missing | B/Kine/JC1 | |
| Concentration (Original) | Hugh Downs | 1963 | Art vs. Nettie | B/Kine/JC1 | |
| Concentration (Original) | Hugh Downs | 1963 | Ralph vs. Arthur Day 1 | B/Kine/JC1 | |
| Concentration (Original) | Hugh Downs | 1963 | Ralph vs. Arthur Day 2 | B/Kine/JC1 | |
| Concentration (Original) | Hugh Downs | 1967 | Dorothy vs. Clara | B/Kine/JC1 | |
| Concentration (Original) | Hugh Downs | 1967 | Santa vs. Santa | B/Kine/JC1 | |
| Concentration (Original) | Bob Clayton | 1969 | Diane vs. Pat | B/Kine/JC1 | |
| Concentration (Original) | Bob Clayton | 1969 | Christmas | B-/Kine OC/TA-1 | |
| Concentration (Original) | Bob Clayton | 3/23/73 | Final episode in color! | A-/Kine/TA-1 | |
| Concentration (Narz) | Jack Narz | 1976 | 0971 - Nancy vs. Millie | 1stGen/Buzzr | |
| Concentration (Narz) | Jack Narz | 1976 | 0972 - Teri vs. Ronnie | 1stGen/Buzzr | |
| Concentration (Narz) | Jack Narz | 1976 | 0973 - Teri vs. Paula | 1stGen/Buzzr | |
| Concentration (Narz) | Jack Narz | 1976 | 0974 - Linda vs. Steve | 1stGen/Buzzr | |
| Concentration (Narz) | Jack Narz | 1976 | 0975 - Barbara vs. Phil | 1stGen/Buzzr | |
| Concentration (Narz) | Jack Narz | 1976 | 0981 - Freda vs. Bonnie | 1stGen/Buzzr | |
| Concentration (Narz) | Jack Narz | 1976 | 0982 - Terri vs. Chris | 1stGen/Buzzr | |
| Concentration (Narz) | Jack Narz | 1976 | 0983 - Pat vs. Greg | 1stGen/Buzzr | |
| Concentration (Narz) | Jack Narz | 1976 | 0984 - Shirley vs. Sandi | 1stGen/Buzzr | |
| Concentration (Narz) | Jack Narz | 1976 | 0985 - Rose vs. Jim | 1stGen/Buzzr | |
| Concentration (Narz) | Jack Narz | 1976 | 0991 - Carin vs. Janet | 1stGen/Buzzr | |
| Concentration (Narz) | Jack Narz | 1976 | 0992 - Sandy vs. Kay | 1stGen/Buzzr | |
| Concentration (Narz) | Jack Narz | 1976 | 0993 - Sherry vs. Glenn | 1stGen/Buzzr | |
| Concentration (Narz) | Jack Narz | 1976 | 0994 - Jeri vs. John | 1stGen/Buzzr | |
| Concentration (Narz) | Jack Narz | 1976 | 0995 - Tina vs. Sally | 1stGen/Buzzr | |
| Concentration (Narz) | Jack Narz | 1976 | 1001 - Pam vs. Mary Lou | 1stGen/Buzzr | |
| Concentration (Narz) | Jack Narz | 1976 | 1002 - Lorraine vs. Marilyn | 1stGen/Buzzr | |
| Concentration (Narz) | Jack Narz | 1976 | 1003 - Vera vs. Denise | 1stGen/Buzzr | |
| Concentration (Narz) | Jack Narz | 1976 | 1004 - Trina vs. Karen | 1stGen/Buzzr | |
| Concentration (Narz) | Jack Narz | 1976 | 1005 - Dorothy vs. Mark | 1stGen/Buzzr | |
| Concentration (Narz) | Jack Narz | 1976 | 1011 - Judy vs. Bill | 1stGen/Buzzr | |
| Concentration (Narz) | Jack Narz | 1976 | 1012 - Ada vs. Sharon | 1stGen/Buzzr | |
| Concentration (Narz) | Jack Narz | 1976 | 1013 - Debbie vs. Julie | 1stGen/Buzzr | |
| Concentration (Narz) | Jack Narz | 1976 | 1014 - Freda vs. Nica | 1stGen/Buzzr | |
| Concentration (Narz) | Jack Narz | 1976 | 1015 - Eileen vs. Mike | 1stGen/Buzzr | |
| Concentration (Narz) | Jack Narz | 1976 | 1021 - Margaret vs. Linda | 1stGen/Buzzr | |
| Concentration (Narz) | Jack Narz | 1976 | 1022 - Liz vs. Barbara | 1stGen/Buzzr | |
| Concentration (Narz) | Jack Narz | 1976 | 1023 - Beverly vs. Betty | 1stGen/Buzzr | |
| Concentration (Narz) | Jack Narz | 1976 | 1024 - Tom vs. Donna | 1stGen/Buzzr | |
| Concentration (Narz) | Jack Narz | 1976 | 1025 - Veronica vs. Hilda | 1stGen/Buzzr | |
| Concentration (Narz) | Jack Narz | 1978 | Linda vs. Randy | B-/SM/TA-1 | |
| Concentration (Bean) | Orson Bean | 1985 | Unsold Pilot #1 | A/SM/TA-1 | |
| Classic Concentration | Alex Trebek | 5/4/87 | 001 – Diana vs. David | 1stGen/Buzzr, A-/KNBC OC/JC1, B/WNBC OC/JC1 | |
| Classic Concentration | Alex Trebek | 5/6/87 | 002 – Russ vs. Diana | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 5/7/87 | 003 – Todd vs. Su | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 5/8/87 | 004 – Todd vs. Cindy | 1stGen/Buzzr, B/OB/TA-1 | |
| Classic Concentration | Alex Trebek | 5/11/87 | 005 – Tammie vs. David | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 5/12/87 | 006 – Tammie vs. Joel | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 5/13/87 | 007 – Tammie vs. Jason | 1stGen/Buzzr, A-/OB/TA-1 | |
| Classic Concentration | Alex Trebek | 5/14/87 | 008 – Jason vs. Renee | 1stGen/Buzzr, B/OB/TA-1 | |
| Classic Concentration | Alex Trebek | 5/15/87 | 009 – Jason vs. Susan | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 5/18/87 | 010 – Paula vs. Linwood | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 5/19/87 | 011 – Clyde vs. Paula | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 5/20/87 | 012 – Bob vs. Laura | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 5/21/87 | 013 – Jan vs. Bob | B-/OB/TA-1 | |
| Classic Concentration | Alex Trebek | 5/22/87 | 014 – Jan vs. Paul | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 5/25/87 | 015 – Barry vs. Jan | 1stGen/Buzzr, A-/OB/TA-1 | |
| Classic Concentration | Alex Trebek | 5/26/87 | 016 – Monica vs. Barry | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 5/27/87 | 017 – Barry vs. Martha | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 5/28/87 | 018 – Greg vs. Bonnie | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 5/29/87 | 019 – Marla vs. Cecil | 1stGen/Buzzr, A-/OC/JC1 | |
| Classic Concentration | Alex Trebek | 6/1/87 | 020 – Bob vs. Marla | 1stGen/Buzzr, B+/OC/JC1 | |
| Classic Concentration | Alex Trebek | 6/2/87 | 021 – Marla vs. Art | 1stGen/Buzzr, A-/OC/JC1 | |
| Classic Concentration | Alex Trebek | 6/3/87 | 022 – Kelly vs. Art | 1stGen/Buzzr, B/OC/JC1 | |
| Classic Concentration | Alex Trebek | 6/4/87 | 023 – Kelly vs. Vince | 1stGen/Buzzr, B/OC/JC1 | |
| Classic Concentration | Alex Trebek | 6/5/87 | 024 – Robin vs. Joseph | 1stGen/Buzzr, A-/OC/JC1 | |
| Classic Concentration | Alex Trebek | 6/8/87 | 025 – Robin vs. Joseph Pt. 2 | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 6/9/87 | 026 – Danny vs. Robin | 1stGen/Buzzr, B+/OC/JC1 | |
| Classic Concentration | Alex Trebek | 6/10/87 | 027 – Reed vs. Annie | 1stGen/Buzzr, A-/OC/JC1 | |
| Classic Concentration | Alex Trebek | 6/11/87 | 028 – Annie vs. Brian | 1stGen/Buzzr, B+/OC/JC1 | |
| Classic Concentration | Alex Trebek | 6/12/87 | 029 – Doug vs. LaVerne | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 6/15/87 | 030 – Doug vs. Karen | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 6/16/87 | 031 – Sandy vs. Steven | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 6/17/87 | 032 – John vs. Sandy | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 6/18/87 | 033 – Sandy vs. Mark | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 6/19/87 | 034 – Greg vs. Vicki | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 6/22/87 | 035 – Meg vs. Greg | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 6/23/87 | 036 – Meg vs. Peter | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 6/24/87 | 037 – Michele vs. Peter | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 6/25/87 | 038 – Janet vs. Dan | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 6/26/87 | 039 – Joan vs. Dan | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 6/29/87 | 040 – Joan vs. Kevin | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 6/30/87 | 041 – David vs. Peggine | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 7/1/87 | 042 – Scott vs. Linda | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 7/2/87 | 043 – Scott vs. Cynthia | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 7/3/87 | 044 – Judith vs. Scott | 1stGen/Buzzr, A/OC/TA-1 | |
| Classic Concentration | Alex Trebek | 7/6/87 | 045 – Julie vs. Jim | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 7/10/87 | 046 – Julie vs. Tom | 1stGen/Buzzr, A-/OB/JC1 | |
| Classic Concentration | Alex Trebek | 7/20/87 | 047 – Julie vs. Tom Pt. 2 | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 7/22/87 | 048 – Tom vs. Hilary | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 7/23/87 | 049 – Sten vs. Hilary | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 7/24/87 | 050 – Sten vs. Carol | 1stGen/Buzzr, A/OC/TA-1 | |
| Classic Concentration | Alex Trebek | 7/27/87 | 051 – Bob vs. Sharon | 1stGen/Buzzr, A/OC/TA-1 | |
| Classic Concentration | Alex Trebek | 7/29/87 | 052 – Bob vs. Kitty | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 8/3/87 | 053 – Kitty vs. Mike | 1stGen/Buzzr, A/OC/TA-1 | |
| Classic Concentration | Alex Trebek | 8/4/87 | 054 – Mike vs. Adriana | 1stGen/Buzzr, B/OB/JC1 | |
| Classic Concentration | Alex Trebek | 8/5/87 | 055 – Linda vs. Mike | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 8/6/87 | 056 – Christy vs. Terry | 1stGen/Buzzr, A-/OC/TA-1 | |
| Classic Concentration | Alex Trebek | 8/7/87 | 057 – Christy vs. Andy | 1stGen/Buzzr, A/OC/TA-1 | |
| Classic Concentration | Alex Trebek | 8/10/87 | 058 – Andy vs. Lisa | 1stGen/Buzzr, A/OC/TA-1 | |
| Classic Concentration | Alex Trebek | 8/11/87 | 059 – Karen vs. Andy | 1stGen/Buzzr, A/OC/TA-1 | |
| Classic Concentration | Alex Trebek | 8/12/87 | 060 – Effie vs. Bill | 1stGen/Buzzr, A/OC/TA-1 | |
| Classic Concentration | Alex Trebek | 8/13/87 | 061 – Dennis vs. Effie | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 8/14/87 | 062 – Dennis vs. Thea | 1stGen/Buzzr, A-/OC/JC1 | |
| Classic Concentration | Alex Trebek | 8/17/87 | 063 – Julieanna vs. Craig | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 8/18/87 | 064 – Craig vs. Mary | 1stGen/Buzzr, A/OC/TA-1 | |
| Classic Concentration | Alex Trebek | 8/19/87 | 065 – Craig vs. Gwenn | 1stGen/Buzzr, A/OC/TA-1 | |
| Classic Concentration | Alex Trebek | 8/20/87 | 066 – Michael vs. Gwenn – Car game malfunctions | 1stGen/Buzzr, A/OC/TA-1 | |
| Classic Concentration | Alex Trebek | 8/21/87 | 067 – Gwenn vs. Michael – Pokey the chihuahua appears for the first time | 1stGen/Buzzr, A/OC/TA-1 | |
| Classic Concentration | Alex Trebek | 8/24/87 | 068 – Janet vs. Madrid | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 8/25/87 | 069 – Dori vs. Madrid | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 8/26/87 | 070 – Diana vs. Madrid | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 8/27/87 | 071 – Madrid vs. Bonita | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 8/28/87 | 072 – Bonita vs. Warren | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 8/31/87 | 073 – Warren vs. Mame | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 9/1/87 | 074 – Warren vs. Laura | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 9/2/87 | 075 – Breton vs. Laura | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 9/3/87 | 076 – Breton vs. Angela | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 9/4/87 | 077 – Max vs. Angela | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 9/7/87 | 078 – Max vs. Sharon | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 9/8/87 | 079 – Pat vs. Sharon | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 9/9/87 | 080 – Danny vs. Sharon | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 9/10/87 | 081 – Marc vs. Sue | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 9/11/87 | 082 – Marc vs. Karin | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 9/14/87 | 083 – Karin vs. Gene | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 9/15/87 | 084 – Eric vs. Karin | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 9/16/87 | 085 – Cindy vs. Dan | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 9/17/87 | 086 – Dan vs. Emily | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 9/18/87 | 087 – June vs. Dan | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 9/21/87 | 088 – Jeff vs. Bobbie | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 9/22/87 | 089 – Jeff vs. Dionne | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 9/23/87 | 090 – Victor vs. Gerrie | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 9/24/87 | 091 – Gerrie vs. Ron | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 9/25/87 | 092 – Melia vs. Ron | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 9/28/87 | 093 – Melia vs. Thompson | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 9/29/87 | 094 – Thompson vs. Diane | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 9/30/87 | 095 – Thompson vs. Jennifer | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 10/1/87 | 096 – Helen vs. Michael | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 10/2/87 | 097 – Michael vs. Janeanne | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 10/5/87 | 098 – Michael vs. Vicki | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 10/6/87 | 099 – Barbie vs. Hal | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 10/7/87 | 100 – Rachel vs. Hal | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 10/8/87 | 101 – Rachel vs. David | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 10/9/87 | 102 – Philip vs. Stephanie | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 10/12/87 | 103 – Stephanie vs. Kelly | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 10/13/87 | 104 – Stephanie vs. John | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 10/14/87 | 105 – John vs. Anna | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 10/15/87 | 106 – John vs. Yvette | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 10/16/87 | 107 – Yvette vs. Tyrone | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 10/19/87 | 108 – Yvette vs. John | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 10/20/87 | 109 – Frank vs. Vera | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 10/21/87 | 110 – Paul vs. Vera | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 10/22/87 | 111 – John vs. Vera | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 10/23/87 | 112 – Rich vs. Vera | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 10/26/87 | 113 – Virginia vs. Rich | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 10/27/87 | 114 – Virginia vs. Bob | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 10/28/87 | 115 – Pam vs. Bob | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 10/29/87 | 116 – Andrea vs. Clyde | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 10/30/87 | 117 – Andrea vs. Frank | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 11/2/87 | 118 – Timm vs. Andrea | 1stGen/Buzzr, A/OC/JC1 | |
| Classic Concentration | Alex Trebek | 11/3/87 | 119 – Greg vs. Margarita | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 11/4/87 | 120 – Greg vs. Kaylynn – Green Take introduced | 1stGen/Buzzr, A-/OB/TA-1 | |
| Classic Concentration | Alex Trebek | 11/5/87 | 121 – Mike vs. Betsy | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 11/6/87 | 122 – Betsy vs. Dennis | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 11/9/87 | 123 – Diana & Rhonda vs. Craig & Suzanne – Kids Week | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 11/10/87 | 124 – Kelley & Joan vs. Tarrell & Esther – Kids Week | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 11/11/87 | 125 – Jessica & Alesia vs. Brad & Dave – Kids Week | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 11/12/87 | 126 – Donald & Paula vs. Michelle & Mike – Kids Week | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 11/13/87 | 127 – Brian & Tracy vs. Shawna & Debi – Kids Week | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 11/16/87 | 128 – Betsy vs. Carl – Around the World Week | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 11/17/87 | 129 – Sally vs. Benjamin – Around the World Week | 1stGen/Buzzr, A/RPT/TA-1 | |
| Classic Concentration | Alex Trebek | 11/18/87 | 130 – Sally vs. Mark – Around the World Week | 1stGen/Buzzr, A/RPT+OC/TA-1 | |
| Classic Concentration | Alex Trebek | 11/19/87 | 131 – Robbie vs. Nancy – Around the World Week – Last segment missing | A/RPT/TA-1 | |
| Classic Concentration | Alex Trebek | 11/20/87 | 132 – Robyn vs. Robbie – Around the World Week | 1stGen/Buzzr, A/RPT/TA-1 | |
| Classic Concentration | Alex Trebek | 11/23/87 | 133 – Mark vs. Robyn | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 11/24/87 | 134 – Rod vs. Robyn | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 11/25/87 | 135 – Rod vs. Susan | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 11/27/87 | 136 – Paul vs. Laurie | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 11/30/87 | 137 – Laurie vs. Gary | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 12/1/87 | 138 – Robert vs. Stephanie | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 12/2/87 | 139 – Robert vs. Mary | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 12/3/87 | 140 – Monica vs. Stan – Classic Concentration is a puzzle | 1stGen/Buzzr, A-/OB/TA-1 | |
| Classic Concentration | Alex Trebek | 12/4/87 | 141 – Monica vs. Patrick | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 12/7/87 | 142 – AJ vs. Monica | 1stGen/Buzzr, B-/OB/TA-1 | |
| Classic Concentration | Alex Trebek | 12/9/87 | 143 – Bill vs. Gwenn | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 12/10/87 | 144 – Bill vs. Denise | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 12/11/87 | 145 – Jolene vs. Bill | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 12/14/87 | 146 – Jeff vs. Jolene | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 12/15/87 | 147 – Jolene vs. Jim | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 12/17/87 | 149 – Sue vs. Jim | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 12/18/87 | 150 – Sue vs. Kevin | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 12/21/87 | 151 – Kevin vs. Terri | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 12/22/87 | 152 – Mart vs. Linda | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 12/23/87 | 153 – Anna vs. Mart | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 12/24/87 | 154 – Mart vs. Staci | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 12/28/87 | 155 – Wayne vs. Nancy | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 12/29/87 | 156 – Joyce vs. Jackson | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 12/30/87 | 157 – Jackson vs. Dorothy | 1stGen/Buzzr, A/OC/TA-1 | |
| Classic Concentration | Alex Trebek | 12/31/87 | 158 – Jackson vs. Helen | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 1/1/88 | 159 – Lorraine vs. Philip | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 1/4/88 | 160 – Susie vs. Jeff | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 1/5/88 | 161 – Kathy vs. Keith | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 1/6/88 | 162 – Patrick vs. Kathy | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 1/7/88 | 163 – Sandra vs. Barry | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 1/8/88 | 164 - Sandra vs. Michael | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 1/11/88 | 165 - Glenn vs. Sandra | 1stGen/Buzzr, A-/OC/TA-1 | |
| Classic Concentration | Alex Trebek | 1/12/88 | 166 - Chuck vs. Brenda | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 1/13/88 | 167 - Aggie vs. Chuck | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 1/14/88 | 168 - Chuck vs. Mary | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 1/15/88 | 169 - Debbie vs. Dale | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 1/18/88 | 170 - Barry vs. Debbie | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 1/19/88 | 171 - Mark vs. Shelley | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 1/20/88 | 172 - David vs. Susan | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 1/21/88 | 173 - Mike vs. Terri | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 1/22/88 | 174 - Mike vs. Terri (again) | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 1/25/88 | 175 - Terri vs. Michael | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 1/26/88 | 176 - Darlene vs. Rocky | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 1/27/88 | 177 - Darlene vs. Ron | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 1/29/88 | 179 - Laura vs. Patrick | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 2/1/88 | 180 - Paula vs. George | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 2/2/88 | 181 - Paula vs. Rob | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 2/3/88 | 182 - Ron vs. Linda | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 2/4/88 | 183 - Linda vs. Carlos | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 2/5/88 | 184 - Claradell vs. Peter | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 2/8/88 | 185 - Cheryl vs. Peter | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 2/9/88 | 186 - Cindy vs. Peter | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 2/10/88 | 187 - Peter vs. Gloria | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 2/11/88 | 188 - Marti vs. Larry | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 2/12/88 | 189 - Larry vs. Judi | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 2/15/88 | 190 - Judi vs. Peter | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 2/16/88 | 191 - Michael vs. Ina | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 2/17/88 | 192 - Pat vs. Michael | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 2/18/88 | 193 - Susan vs. Gene | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 2/19/88 | 194 - Ross vs. Leslie | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 2/22/88 | 195 - Sue vs. Brady - South Seas Adventure Week | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 2/23/88 | 196 - Kathy vs. Brady - South Seas Adventure Week | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 2/24/88 | 197 - Norm vs. Molly - South Seas Adventure Week | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 2/25/88 | 198 - Janet vs. Norm - South Seas Adventure Week | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 2/26/88 | 199 - Glori vs. Layne - South Seas Adventure Week | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 2/29/88 | 200 - Layne vs. Arleen | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 3/1/88 | 201 - Arlene vs. George | 1stGen/Buzzr, A-/OB/JC1 | |
| Classic Concentration | Alex Trebek | 3/2/88 | 202 - Scott vs. Dorothy | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 3/3/88 | 203 - Shirley vs. Keith | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 3/4/88 | 204 - Shirley vs. Pete | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 3/7/88 | 205 - Pete vs. Sandra | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 3/8/88 | 206 - Dany vs. Mark | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 3/9/88 | 207 - Mark vs. Beth | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 3/10/88 | 208 - Mike vs. Sue | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 3/11/88 | 209 - Sue vs. Hutton | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 3/14/88 | 210 - Joy vs. Robert | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 3/15/88 | 211 - Robert vs. Diane - First show with Two Strikes format | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 3/16/88 | 212 - Diane vs. Kevin | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 3/17/88 | 213 - Wilson vs. Cheryl | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 3/18/88 | 214 - Kevin vs. Kathy | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 3/21/88 | 215 - Kevin vs. Kathy (again) | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 3/22/88 | 216 - Lisa vs. Tommy | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 3/23/88 | 217 - Mike vs. Dorrie | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 3/24/88 | 218 - Dorrie vs. Mike | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 3/25/88 | 219 - Cynthia vs. John | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 3/28/88 | 220 - Cynthia vs. Jeffrey | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 3/29/88 | 221 - Cynthia vs. David | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 3/30/88 | 222 - Blanche vs. Lenny | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 3/31/88 | 223 - Barbet vs. Bill | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 4/1/88 | 224 - Barbet vs. Dan | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 4/4/88 | 225 - Freddy vs. Barbet | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 4/5/88 | 226 - Roger vs. Linda | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 4/6/88 | 227 - Linda vs. Bob | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 4/7/88 | 228 - Bob vs. Ann | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 4/8/88 | 229 - Wendell vs. Janet | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 4/11/88 | 230 - Shelley vs. Wendell | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 4/12/88 | 231 - Connie vs. Michael | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 4/13/88 | 232 - Michael vs. Connie | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 4/14/88 | 233 - Michael vs. Amy | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 4/15/88 | 234 - Jim vs. Mae | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 4/18/88 | 235 - Mae vs. Bill | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 4/19/88 | 236 - Mae vs. Corky | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 4/20/88 | 237 - Jack vs. Adrienne | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 4/21/88 | 238 - Jack vs. Angela | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 4/22/88 | 239 - Jack vs. Angela (again) | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 4/25/88 | 240 - Angela vs. Anthony | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 4/26/88 | 241 - Linda vs. Colin | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 4/27/88 | 242 - Colin vs. Kathy | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 4/28/88 | 243 - Michael vs. Bonnie | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 4/29/88 | 244 - Bonnie vs. Mark | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 5/2/88 | 245 - Bonnie vs. David | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 5/3/88 | 246 - Susie vs. Reggie | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 5/4/88 | 247 - Dan vs. Rita | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 5/5/88 | 248 - Dan vs. Rita (again) | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 5/6/88 | 249 - Rita vs. Sandy | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 5/9/88 | 250 - Marita vs. Gregg | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 5/10/88 | 251 - Marita vs. Stu | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 5/11/88 | 252 - Christian vs. Marita | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 5/12/88 | 253 - Lisa vs. Todd | 1stGen/Buzzr, B/OB/JC1 | |
| Classic Concentration | Alex Trebek | 5/13/88 | 254 - Jerry vs. Pat | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 5/16/88 | 255 - Joan vs. Jerry | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 5/17/88 | 256 - Jeff vs. Joan | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 5/18/88 | 257 - Jeff vs. Carol | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 5/19/88 | 258 - Jim vs. Tania | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 5/20/88 | 259 - Jim vs. Kari | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 5/23/88 | 260 - Steve vs. Tina | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 5/24/88 | 261 - Susan vs. Michael | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 5/26/88 | 263 - Pattie vs. Larry | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 5/27/88 | 264 - Pattie vs. Dennis | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 5/30/88 | 265 - Don vs. Julia | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 5/31/88 | 266 - Don vs. Barbara | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 6/1/88 | 267 - Barbara vs. Peter | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 6/2/88 | 268 - Peter vs. Deanna | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 6/3/88 | 269 - Mike vs. Julia | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 6/6/88 | 270 - Jerry vs. Barbara | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 6/7/88 | 271 - Lisa Kay vs. Jerry | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 6/8/88 | 272 - Lisa Kay vs. Rod | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 6/9/88 | 273 - Sara vs. David | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 6/10/88 | 274 - Sara vs. David (again) | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 6/13/88 | 275 - Sara vs. Bob | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 6/14/88 | 276 - Peter vs. Gretchen | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 6/15/88 | 277 - Stephen vs. Gretchen | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 6/16/88 | 278 - Warren vs. Honey | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 6/17/88 | 279 - Warren vs. Cindy | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 6/20/88 | 280 - Warren vs. Lynda | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 6/21/88 | 281 - Lynda vs. Bob | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 6/22/88 | 282 - Bob vs. Annette | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 6/23/88 | 283 - Sue vs. Bob | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 6/24/88 | 284 - Sandra vs. Toby | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 6/27/88 | 285 - Toby vs. Carol | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 6/28/88 | 286 - Toby vs. Susan | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 6/29/88 | 287 - Sue vs. Stephen | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 6/30/88 | 288 - Sue vs. Gene | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 7/12/88 | 295 - Steve vs. Jody | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 7/13/88 | 296 - Steve vs. Adrienne | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 7/18/88 | 299 - Kyle vs. Dottie | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 7/19/88 | 300 - Cyndi vs. Gary | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 7/20/88 | 301 - Gary vs. Valerie | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 7/21/88 | 302 - Jim vs. Stacy | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 7/22/88 | 303 - Stacy vs. Dwight | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 7/25/88 | 304 - Dwight vs. Bernadette | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 7/26/88 | 305 - Bernadette vs. John | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 7/27/88 | 306 - Anne vs. David | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 7/28/88 | 307 - David vs. Ramona | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 7/29/88 | 308 - Brian vs. Kim | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 8/1/88 | 309 - Brian vs. Trish | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 8/2/88 | 310 - Brian vs. Trish (again) | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 8/3/88 | 311 - Senia vs. Tom | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 8/4/88 | 312 - Joe vs. Tina | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 8/5/88 | 313 - Julie vs. Richard | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 8/8/88 | 314 - Sheila vs. Richard | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 8/9/88 | 315 - Julie vs. Troy - First show with Best 2 out of 3 format | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 8/10/88 | 316 - Troy vs. Judy | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 8/11/88 | 317 - Troy vs. Lauri | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 8/12/88 | 318 - Carolyn vs. David | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 8/15/88 | 319 - Carolyn vs. Danny | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 8/16/88 | 320 - Danny vs. Sherlyn | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 8/17/88 | 321 - Danny vs. Ginny | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 8/18/88 | 322 - Danny vs. Ronlyn | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 8/19/88 | 323 - Mitch vs. Jennifer | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 8/22/88 | 324 - Mitch vs. Julie | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 9/5/88 | 334 - Caprice vs. Rodney | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 9/6/88 | 335 - Robert vs. Kaye | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 9/7/88 | 336 - Robert vs. Megan | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 9/8/88 | 337 - Megan vs. Phil | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 9/9/88 | 338 - Lynn vs. Larry | 1stGen/Buzzr, A/OC/JC1 | |
| Classic Concentration | Alex Trebek | 9/12/88 | 339 - Lynn vs. Mark | 1stGen/Buzzr, A-/OB/JC1 | |
| Classic Concentration | Alex Trebek | 9/13/88 | 340 - Mark vs. Leah | 1stGen/Buzzr, A/OC/TA-1 | |
| Classic Concentration | Alex Trebek | 9/14/88 | 341 - Mark vs. Ann | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 9/15/88 | 342 - Devon vs. Ann | 1stGen/Buzzr, A/OC/TA-1 | |
| Classic Concentration | Alex Trebek | 9/16/88 | 343 - Robin vs. Mark | 1stGen/Buzzr, | | |
| Classic Concentration | Alex Trebek | 9/19/88 | 344 - Robin vs. Mark (again) | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 9/20/88 | 345 - Robin vs. John | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 9/21/88 | 346 - Robin vs. Stephen | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 9/22/88 | 347 - Kari vs. Charles | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 9/23/88 | 348 - Trish vs. Carl | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 9/26/88 | 349 - Carl vs. Tammi | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 9/27/88 | 350 - Carl vs. Shauna | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 9/28/88 | 351 - Shauna vs. Shawn | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 9/29/88 | 352 - Shawn vs. Robin | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 9/30/88 | 353 - Philip vs. Helene | 1stGen/Buzzr, A-/OC/JC1 | |
| Classic Concentration | Alex Trebek | 10/3/88 | 354 - Helene vs. Mike | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 10/4/88 | 355 - Helene vs. Richard | 1stGen/Buzzr, A-/OC/JC1 | |
| Classic Concentration | Alex Trebek | 10/5/88 | 356 - Helene vs. Tim | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 10/6/88 | 357 - Sonja vs. Rich | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 10/7/88 | 358 - Rich vs. Jerilyn | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 10/10/88 | 359 - Jerilyn vs. Shawn | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 10/11/88 | 360 - Shawn vs. Nadeane | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 10/12/88 | 361 - Bill vs. Jo Anne | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 10/13/88 | 362 - Bill vs. Julia | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 10/14/88 | 363 - Ted vs. Donna | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 10/17/88 | 364 - Donna vs. Teddy | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 10/18/88 | 365 - Teddy vs. Madelon | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 10/19/88 | 366 - Teddy vs. Valerie | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 10/20/88 | 367 - Valerie vs. Cal | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 10/21/88 | 368 - Valerie vs. Terri | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 11/1/88 | 375 - Judge vs. Nancy | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 11/2/88 | 376 - Nancy vs. Walter | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 11/3/88 | 377 - Nancy vs. Rocky | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 11/4/88 | 378 - Rocky vs. Doris | 1stGen/Buzzr | |
| Classic Concentration | Alex Trebek | 12/13/88 | Jerry vs. Alison | B+/OC/JC1 | |
| Classic Concentration | Alex Trebek | 1/9/89 | Randy vs. Blanche | B+/OC/JC1 | |
| Classic Concentration | Alex Trebek | 1989 | Randy vs. Darlene | B+/OC/JC1 | |
| Classic Concentration | Alex Trebek | 5/4/89 | Kent vs. Judy | A-/OC/JC1 | |
| Classic Concentration | Alex Trebek | 7/89 | Becky vs. Thom | A/OB/JC1 | |
| Classic Concentration | Alex Trebek | 7/89 | Rick vs. Becky – Marc Breslow’s birthday! | A/OB/TA-1 | |
| Classic Concentration | Alex Trebek | 7/89 | Becky vs. Thom | A/OB/TA-1 | |
| Classic Concentration | Alex Trebek | 1989 | Tricia vs. David - Woodstock episode | A-/OB/JC1 | |
| Classic Concentration | Alex Trebek | 3/9/90 | Laura vs. Wally | B/OB/JC1 | |
| Classic Concentration | Alex Trebek | 4/10/90 | Lance vs. “Greedy” Wendy | A-/OC/TA-1 | |
| Classic Concentration | Alex Trebek | 4/18/90 | Eileen vs. Ray | A-/OC/TA-1 | |
| Classic Concentration | Alex Trebek | 5/90 | Larry vs. Gabe | B/OB/JC1 | |
| Classic Concentration | Alex Trebek | 10/30/90 | Angela vs. David - Halloween Week | B+/OB/JC1 | |
| Classic Concentration | Alex Trebek | 10/90 | Martha vs. Doug | A-/OB/JC1 | |
| Classic Concentration | Alex Trebek | 1990 | Nikki vs. Rick | A-/OB/JC1 | |
| Classic Concentration | Alex Trebek | 1990 | Roxi vs. Debo | B/OC/JC1 | |
| Classic Concentration | Alex Trebek | 1990 | Andrew vs. Anne | A-/OC/TA-1 | |
| Classic Concentration | Alex Trebek | 11/26/90 | Phil vs. Theresa | A-/OC/JC1 | |
| Classic Concentration | Alex Trebek | 2/91 | Kent vs. Stephanie | B/OB/JC1 | |
| Classic Concentration | Alex Trebek | 1991 | Ben vs. Susan - Ben loses the bonus round on purpose | A-/OB/JC1 | |
| Classic Concentration | Alex Trebek | 1991 | Brad vs. Steven | A/SM/JC1 | |
| Classic Concentration | Alex Trebek | 1991 | Dina vs. David | B/OB/JC1 | |
| Classic Concentration | Alex Trebek | 1991 | Dina vs. Paul | B/OB/JC1 | |
| Classic Concentration | Alex Trebek | 1991 | Lynn vs. Joe | B/OB/JC1 | |
| Classic Concentration | Alex Trebek | 1991 | Kevin vs. Carol | B/OB/JC1 | |
| Classic Concentration | Alex Trebek | 1991 | Joy vs. Dave - 1000th show | A-/OB/TA-1 | |
| Classic Concentration | Alex Trebek | 1991 | Lori vs. Christina | B/OC/JC1 | |
| Classic Concentration | Alex Trebek | 1991 | Polly vs. Jamie | A-/OB/JC1 | |
| Classic Concentration | Alex Trebek | 1991 | Stephanie vs. Jim | A-/OB/JC1 | |
| Classic Concentration | Alex Trebek | 1991 | Terri vs. Antoinette | A/SM?/JC1 | |
| Classic Concentration | Alex Trebek | 9/20/91 | Bob vs. Amy - Last episode | B+/OB/JC1, C/OC/TA-1 |
