The Master Key
- Tahun: 1945
- Negara: United States of America
- Genre: Action, War, Crime
- Studio: Universal Pictures
- Kata kunci: movie serial
- Pengarah: Lewis D. Collins, Ray Taylor
- Pelakon: Milburn Stone, Jan Wiley, Dennis Moore, Addison Richards, Byron Foulger, Maris Wrixon
