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Howard Duff and Jay C. Flippen made their screen debuts in this picture. Duff, who played the character of "Soldier" in the film, was known for his portrayal of Sam Spade on the CBS radio series The Adventures of Sam Spade, and Flippen, who played "Guard Hodges," was a New York baseball commentator. The portrait of the woman used in the film to evoke the memories of each inmate was actually a composite picture of actresses Yvonne De Carlo, Ann Blyth and Ella Raines, painted by John Decker. Hollywood Reporter production charts list Glenn Strange, Rex Dale and Ruth Sanderson as members of the cast, but their appearance in the final film could not be confirmed. According to a February 26, 1947 Hollywood Reporter item, background footage was shot at the Sacramento River in Northern California.