The Master Key 1945

Synopsis:

Before the outbreak of WWII, Nazi sympathizers plot to undermine America.

Directed by: Lewis D. Collins & Ray Taylor
Written by: Joseph O'Donnell & George H. Plympton & Ande Lamb
Runtime: 226 minutes
Tagline: 13 Chapters of Terrific Thrills!
Cast:
Milburn Stone
Milburn Stone
Agent Tom Brant 
Jan Wiley
Jan Wiley
Janet Lowe 
Dennis Moore
Dennis Moore
Jack Ryan 
Addison Richards
Addison Richards
Gerhard Doenitz / Garret Donahue 
Byron Foulger
Byron Foulger
Prof. Elwood Henderson 
Maris Wrixon
Maris Wrixon
Dorothy Newton