The Master Key
- Tahun: 1945
- Negara: United States of America
- Aliran: Aksi, Kejahatan, Kejahatan
- Studio: Universal Pictures
- Kata kunci: movie serial
- Direktur: Lewis D. Collins, Ray Taylor
- Pemeran: Milburn Stone, Jan Wiley, Dennis Moore, Addison Richards, Byron Foulger, Maris Wrixon
