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.
Greer Garson
On 4 October 1956, Garson appeared with Reginald Gardiner as the first two guest stars of the series in the premiere of NBC's "The Ford Show, Starring Tennessee Ernie Ford". She appeared as a mystery guest on "What's My Line" on 25 October 1953 and again on 6 April 1958 to promote her appearance onstage in "Auntie Mame". She also served as a panelist rather than a guest on the "What's My Line" episode which aired on 12 May 1957.