What's My Line? is a weekly panel game show which was produced by Mark Goodson and Bill Todman for CBS television. The original series, which was usually broadcast live, debuted on Thursday, February 2, 1950 at 8:00 p.m. ET and aired on alternating weeks. On Wednesday, April 12, 1950, the broadcast was moved to alternate Wednesday evenings at 9:00 p.m. ET. On Sunday, October 1,...