What's My Line? 1st Telecast (Feb 2nd 1950)

February 2nd 1950
What's My Line? premieres on CBS at 8pm.  
It would settle into its regular Sunday night time at 1030pm on October 1st 1950.

What's My Line? - Polly Bergen (January 28th 1962)

What's My Line? 

January 28th 1962

MYSTERY GUEST: Polly Bergen
PANEL: Dorothy Kilgallen, Martin Gabel, Arlene Francis, Bennett Cerf

What's My Line? (Fred Allen's Debut)

What's My Line? 

August 15th 1954

Fred Allen's Debut

(Mystery Guest : Buffalo Bob Smith and Howdy Doody)

What's My Line? - Miyoshi Umeki; Robert Ryan [panel] (May 11, 1958)

What's My Line? 

May 11th 1958

Mystery Guest :  Miyoshi Umeki 

(from the 1957 movie Sayonara)

What's My Line? - Andy Griffith (May 3, 1959)

What's My Line?

May 3rd 1959

Mystery Guest : Andy Griffith

What's My Line? - Jan. 23rd, 1955 Dennis Day