Lurene Tuttle and Howard Duff during an episode of Sam Spade

The Adventures of Sam Spade was a radio series based loosely on the private
detective character Sam Spade, created by writer Dashiell Hammett for The
Maltese Falcon. The show ran for 13 episodes on ABC in 1946, for 157
episodes on CBS in 1946-1949, and finally for 51 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.

William Spier Producer/Director of The Adventures
of Sam Spade