A group of amateur detectives sets out to expose The Crooked Circle, a secretive group of hooded occultists.
| Actor | Role |
|---|---|
 Zasu PittsNora Rafferty | Nora Rafferty |
 James GleasonArthur Crimmer | Arthur Crimmer |
 Ben LyonBrand Osborne | Brand Osborne |
 Irene PurcellThelma Parker | Thelma Parker |
 C. Henry GordonYoganda | Yoganda |
 Raymond HattonHarmon (The Hermit) | Harmon (The Hermit) |
 Roscoe KarnsHarry Carter | Harry Carter |
 Berton ChurchillCol. Walters | Col. Walters |
 Spencer ChartersKinny | Kinny |
 Robert FrazerThe Stranger | The Stranger |
 Ethel ClaytonYvonne | Yvonne |
 Frank ReicherRankin | Rankin |
 Christian RubOld Dan | Old Dan |
 Tom KennedyMike, the policeman | Mike, the policeman |
 Paul PanzerCult Member (uncredited) | Cult Member (uncredited) |