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.
Isobel Barnett
In 1956, a reviewer predicted that an alien visiting from another planet could ask anyone between the ages of seven and 70 "What is "What's my Line?"" and "Who is Isobel Barnett?" and be confident of getting an answer. She featured in the first revival of "What's My Line?" which ran for two series from 1973-74.