What’s My Line? was a game show on the CBS Television Network from 1950 to 1967.

Blindfolded celebrity panelists questioned a weekly “mystery guest” to determine his/her employment.

Moderated by John Charles Daly, regular panelists included Dorothy Kilgallen, Arlene Francis, and Bennett Cerf.

What’s My Line? was the longest-running primetime network television game-show in America.

The show won Emmy Awards for “Best Quiz or Audience Participation Show” in 1952, 1953, and 1958 and the Golden Globe for Best TV Show in 1962.

Ref: Wikipedia