Faltering ratings that prompted CBS to prematurely cancel the show on Friday March 29, 1974 with the last celebrity guests are Carol Channing & Soupy Sales. After a mere absence of just 5 Weekdays, The show returned on ABC-TV Monday-Friday May 6-10, 1974 at 4:00-4:30PM (Eastern) with the 1st celebrity guests Anne Meara and Soupy Sales. On September 9-15, 1974 An 1-Weekly Nighttime Pyramid called "THE $25,000 PYRAMID" for the syndicated purpose in the prime-access time slot of 7:30-8:00 PM (Eastern) will released and the host is Bill Cullen & The same 1st celebrity guests from ABC-TV 's "THE $10,000 PYRAMID" are Anne Meara & William Shatner.
The 1st celebrity guests on the debut weekday broadcast of "THE $10,000 PYRAMID" on CBS-TV are June Lockhart & Rob Reiner; Rob Reiner went on to become the first celebrity guest star with his civilian partner named Mr. Bob Lyon to successfully climb to the top of the big pyramid (his winning clue for "Things With A Hole" was "Doughnuts") on Friday March 30, 1973 he wins $10,000.
On Monday-Friday December 23-27, 1974 ABC-TV's "THE $10,000 PYRAMID" has welcomed a new time-slot at 2:00-2:30PM (Eastern) and the new bonus subject card called "THE BIG 7" in which the team picked a category (subject) where it's hidden behind somewhere on The Play-Along Pyramid in the main game, The civilian contestant (Winner/Rival) would be going to win a bonus prize (December 23, 1974-January 24, 1975: A Vacation & Other Prizes as possible and from January 27, 1975 to June 27, 1980: The New Reward of THE BIG 7 is $500 Cash and an option through January 23, 1976 The Team gets 7 points or less is worth $25) within any 1 of 3 Plays in 30 Seconds.
On Monday-Friday January 19-23, 1976 saw the ABC-TV Daytime Game Show has renamed "THE $20,000 PYRAMID" with it's very slightly revised cash prize and the new game winning structure. The 1st celebrity guests on the retitled daytime game show are Jo Anne Worley & Bill Cullen on the same time slot at 2:00-2:30PM (Eastern) and on Monday-Friday January 16-20, 1978 "THE $20,000 PYRAMID" moves to 12NOON-12:30 PM (Eastern) and unfortunately the certain number of ABC-TV Network Stations (except ABC 7 Stations are still owned by the network) has local news stations to fill in this show and it's hard to see it and on June 27, 1980 and the last celebrity guest stars are Miss Lois Nettleton & Mr. Bill Cullen and ABC-TV Cancel the Show Anyway.
The highest scoring main games on the record (through some amazing tie-breakers) occurred on The Friday July 4 (Independence Day), 1975 Broadcast of "THE $10,000 PYRAMID" and that features Lucie Arnaz & Anson Williams with the score of 45-44 & The Monday June 12, 1978 Broadcast of "THE $20,000 PYRAMID" with the score of 43-42 and that features Sandy Duncan and Nipsey Russell. The celebrity guest star with his civilian partner, who was able to win at the big pyramid in the quickest time on record was Billy Crystal in November 1977 with an amazing 26 seconds (while a few others have done it in 30 seconds) out of general time of "The Winner's Circle" is 60 Seconds.
The Bonus Game originally included a 4th line of 4 Categories (Subjects) on the bottom line are worth $25. The Producers didn't realize that's really unworkable through testing activities until days before on-the-air debut broadcast so they covered the bottom line of 4 Subjects completely.
In September 1977 on "THE $20,000 PYRAMID's" Popular celebrity guest star William Shatner was dropped from his role as a favorite guest when he screamed and threw a chair out of the winners circle in disgust when he lost the bonus round for a contestant (The Returning Winner.)
On The 4 Syndicated editions (1974-79, 1981, 1985-88 & 1991-92) on many local television station markets, the daytime network editions and the weekly and daily syndicated editions of Pyramid aired the same day for THE (1st) $25,000 & $100,000 PYRAMIDS except both separate releases in 1981 for "THE $50,000 PYRAMID" and in 1991 for "THE NEW $100,000 PYRAMID."
According to Dick Clark in the episode that aired on Memorial Day (1988?) (at :22) the same studio where they film "The $25,000 Pyramid" is where "All in the Family," "The Carol Burnett Show" and Dinah Shore's Dinah! were filmed. Nathan Cook and Shelley Smith were the guest stars during the game which apparently aired on Memorial Day, 1988. Just days before Nathan Cook died. Contestants were returning champ Caroline and Sherri. Mystery 7 was a home computer.