Author William Peter Blatty once won $10,000 on this show. When Groucho Marx asked what he planned to do with the money, he said he planned to take some time off to "work on a novel." The result was the novel "The Exorcist", published in 1971 and adapted as The Exorcist (1973) two years later.
Groucho Marx stated that the biggest laugh he ever got on the show was when he was talking to a female contestant. He asked about her husband, and she replied earthily, "Have you ever been made love to by a Frenchman?" The audience went into gales of laughter, and Groucho answered, "Not that I can recall!"
George Fenneman, Groucho Marx's announcer on the show, was once asked if Groucho ever embarrassed him on the air. "Each and every show," Fenneman replied.
Although the ratings were still solid, the show stopped production because the producers wanted to begin syndicating reruns of the series. At the time, it was unusual to syndicate reruns of a series that was still on the air. So they replaced it with Tell It to Groucho (1961).
When the game show came to television, Groucho Marx was asked to wear his traditional greasepaint mustache. He declined and decided to grow a real one instead, which he wore for the rest of his life.