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.
Melina Mercouri
On 8 October 1962, Mercouri appeared on the American TV show "What's My Line". After the panel were blindfolded, a strange man appeared on-stage and proclaimed himself "the second mystery guest". Host John Charles Daly quickly called for "the relieving unit" and said "schedule two" (a coded phrase used on live broadcasts in case of an emergency: the cameras are turned to a neutral position and the sound is cut off). The man talked a bit about a dating service he apparently owned before being hustled off the stage by announcer Johnny Olson and executive producer Gil Fates. Daly apologized to the panel and the program continued.