The show ran for 13 episodes on ABC in 1946, for 157 episodes on CBS in 1946–1949, and finally for 75 episodes on NBC in 1949–1951. The series starred Howard Duff (and later, Steve Dunne) as Sam Spade and Lurene Tuttle as his secretary Effie, and took a considerably more tongue-in-cheek approach to the character than the novel or movie.
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