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During the war years Universal did have a co-production arrangement with producer Walter Wanger and his partner, director Fritz Lang, lending the studio some amount of prestige productions. Universal's core audience base was still found in the neighborhood movie theaters, and the studio continued to please the public with low- to medium-budget films. Basil Rathbone and Nigel Bruce in new Sherlock Holmes mysteries (1942–46), teenage musicals with Gloria Jean, Donald O'Connor, and Peggy Ryan (1942–43), and screen adaptations of radio's Inner Sanctum Mysteries with Lon Chaney, Jr. (1943–45). Alfred Hitchcock was also borrowed for two films from Selznick International Pictures: Saboteur (1942) and Shadow of a Doubt (1943).

In what period did film versions of Inner Sanctum Mysteries appear?
1943–45