Chronology: 1939-44
Sponsored by Fleischmann's Yeast, I Love a Mystery first aired on the NBC West Coast network from January 16 to September 29, 1939, weekdays at 3:15pm Pacific time, and then moved to the full NBC network from October 2, 1939 to March 29, 1940, airing weeknights at 7:15pm. In 1940, it expanded to 30-minute episodes from April 4 to June 27 on NBC Thursdays at 8:30pm. Continuing on the Blue Network from September 30, 1940 to June 29, 1942, it was heard Mondays and Wednesdays at 8pm. Procter & Gamble (for Oxydol and Ivory Soap) replaced Fleishmann's Yeast as the sponsor in the series broadcast by CBS from March 22, 1943 to December 29, 1944 with 15-minute episodes heard weeknights at 7pm. A TV movie with David Hartmann was broadcast in the mid-1970s.
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