What's My Line? was one of network television's longest running and most beloved prime time game shows, with a broadcast run of seventeen and one-half years. The game consisted of four panelists trying to guess the occupation of a guest contestant. As the questioning rotated, a panel member asked questions, and the guest would answer either "yes" or "no." A contestant received $5 for each "no" answer, and ten "no" answers ended the game in favor of the contestant. A mystery guest segment was also included, in which the panelists were blindfolded.
May 1975
February 1950 - August 1950
September 1950 - August 1951
September 1951 - August 1952
September 1952 - August 1953
September 1953 - August 1954
September 1954 - August 1955
September 1955 - August 1956
September 1956 - August 1957
September 1957 - August 1958
September 1958 - August 1959
September 1959 - August 1960
September 1960 - August 1961
September 1961 - August 1962
September 1962 - August 1963
September 1963 - August 1964
September 1964 - August 1965
September 1965 - August 1966
September 1966 - September 1967
February 1950 - September 1967