John Charles Daly
Daly's first foray into television was as a panelist on the game show "Celebrity Time". This led to a job in 1950 as the host and moderator on a new panel show produced by Goodson–Todman, "What's My Line?" The show lasted 17 years with Daly hosting all but four episodes of the weekly series.
What's My Line?
"What's My Line?" was a guessing game in which the four panelists attempted to determine the occupation ("i.e.", "line [of work]") of a guest. In the case of the famous mystery guest each week, the panel sought to determine the identity of the contestant. Panelists were required to probe by asking only yes-no questions. A typical episode featured two standard rounds (sometimes a third, and very rarely a rushed fourth) plus one mystery guest round. On the occasions on which there were two mystery guests, the first would usually appear as the first contestant.