What's My Line? is a panel game show that originally ran in the United States, between 1950 and 1967, on CBS, originally in black and white and later in color, with subsequent American revivals. The game uses celebrity panelists to question contestants in order to determine their occupation. The majority of the contestants were from the general public, but there was one weekly celebrity "mystery guest" for whom the panelists were blindfolded. It is on the list of longest-running American primetime network television game-shows. Originally moderated by John Charles Daly and most frequently with regular panelists Dorothy Kilgallen, Arlene Francis, and Bennett Cerf, What's My Line? won three Emmy Awards for Best Quiz or Audience Participation Show in 1952, 1953, and 1958 and the Golden Globe for Best TV Show in 1962.
More than 700 episodes exist as kinescope recordings, filmed in 16mm, which was the only way moving pictures and sound from spontaneous, unscripted television shows could be preserved on a long-term basis prior to the emergence and subsequent widespread use of videotape. Many early episodes were lost because of economic decisions made by CBS executives between 1950 and 1952. All episodes from July 1952 to September 1967 were preserved in the archives of producers Mark Goodson and Bill Todman, but by 1975, some of the episodes had been lost.
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