William Spier was not sold on casting Howard Duff as Sam Spade, but Spier's wife, Kay Thompson, lobbied for Duff until Spier relented.
William Spier married actress June Havoc in 1949.
As a cross-promotion, William Spier presented "The Kandy Tooth," an episode of Sam Spade, on the hour-long Suspense series on January 10, 1948. Spier was the director and producer of both shows at the time.
In producing Suspense on radio, William Spier set ground rules. He wanted the stories to deal with life-and-death situations established at the outset of the episode. He also tried to use, whenever possible, leading actors and actresses from Hollywood.
From 1946 to 1951, William Spier was the producer and director of The Adventures of Sam Spade, Detective on ABC, CBS and NBC radio.
William Spier: (on working with Dashiell Hammett on "Sam Spade") Aside from some adaptations we did early on, he was never directly involved in the writing or production of the shows, but he did drop by from time to time to make sure we were protecting his interests.