Contestants with unusual occupations were interviewed by the panelists. Only questions that could be answered with a "yes" or "no" were allowed. At the conclusion of the questioning, the panelists attempted to guess the contestants occupation. There was also a "mystery guest", usually a famous person; the panelists had to wear masks when questioning this person and the guest usually disguised his/her voice.
Where to Watch What's My Line?
Cast of What's My Line?
