What's My Line?
In 1980, Mark Goodson-Bill Todman Productions, creators of "What's My Line?", produced "That's My Line" which also highlighted the unusual occupations of ordinary people. However, the show was developed as a reality show and had no panel or game elements. "What's My Line?" announcer Johnny Olson was the announcer, and Bob Barker was the host for the show which ran for two seasons on CBS.
Gordon Ramsey
In a 1969 episode of the TV show "What's My Line?", Ramsey appeared as Bozo the Clown as a Mystery Guest. Later in the same episode, Ramsey appeared as himself without the clown makeup, requiring the panel to guess his line, which celebrity panelist Phyllis Newman did.