The Master Key
13 Chapters of Terrific Thrills!
Before the outbreak of WWII, Nazi sympathizers plot to undermine America.
- Year: 1945
- Country: United States of America
- Genre: Action, War, Crime
- Studio: Universal Pictures
- Keyword: movie serial
- Director: Ray Taylor, Lewis D. Collins
- Cast: Milburn Stone, Jan Wiley, Dennis Moore, Addison Richards, Byron Foulger, Maris Wrixon