Groucho Marx did his quiz program, You Bet Your Life, on radio from October 27, 1947 until June 10, 1960 and on TV from October 4, 1950 until June 29, 1961. It was retitled The Groucho Show for its final season and it was called The Best of Groucho in reruns. The program started life on ABC radio, the moved to NBC radio and the televised version was on NBC.
Six months after the game show left NBC prime time, Groucho and most of the same staff were back at work. They were on CBS with a new series called Tell It to Groucho, which was basically the same show but with a fancier set and a different game, plus they'd replaced Groucho's old announcer George Fenneman with a former beauty queen (and You Bet Your Life contestant) named Patty Harmon. The show didn't attract an audience and it was gone in five months.
I think it went off for the same reason as its predecessor: Audiences had just grown weary of the same old same old. Also, I think it had become pretty obvious that very little that was said on either show was truly ad-libbed. Between that and the obvious editing, some of the shows have a kind of phony air. Groucho was still funnier than all other game show hosts but he was still far from his best.
Ms. Harmon, by the way, changed her stage name to Joy Harmon and enjoyed some modest success with her acting career. She was the lady who provocatively and memorably washed the car in Cool Hand Luke. Oh — and the off-camera announcer was Johnny Jacobs, who announced zillions of TV programs, including almost all of the Chuck Barris game shows.
Here's a truncated version of an episode of Tell It to Groucho with special guest Rod Serling. This is from April 2, 1962…