I’ve Got a Secret is a panel game show produced by Mark Goodson and Bill
Todman for CBS television. It was a derivative of What’s My Line?. Instead of 
celebrity panelists trying to determine a contestant’s occupation, the panel
tries to determine a contestant’s "secret", from unusual to embarrassing.

The original version ran until April 3, 1967. It began broadcasting in black and
white and switched to a color format in 1966. The show was originally hosted
by radio and television personality Garry Moore.

Garry Moore with guest celebrity actor Paul Newman

Peter Marshall (Ralph Pierre LaCock) was the original host of the
NBC-TV game show ‘Hollywood Squares’ from 1966 to 1981.

Hugh Malcolm Downs is perhaps best known for his role as co-host
of the NBC News program Today from 1962 to 1971, host of the game
show Concentration from 1958 to 1969, and anchor of the ABC News
magazine 20/20 from 1978 to 1999. Downs was the announcer and
sidekick on NBC’s Tonight Starring Jack Paar.

Show host Hugh Downs