The Master Key
- Joer: 1945
- Land: United States of America
- Genre: Action, War, Crime
- Studio: Universal Pictures
- Schlësselwuert: movie serial
- Direkter: Lewis D. Collins, Ray Taylor
- Besetzung: Milburn Stone, Jan Wiley, Dennis Moore, Addison Richards, Byron Foulger, Maris Wrixon
