The Master Key
"13 Chapters of Terrific Thrills!"
Before the outbreak of WWII, Nazi sympathizers plot to undermine America.


Agent Tom Brant
Janet Lowe

Jack Ryan

Gerhard Doenitz / Garret Donahue

Prof. Elwood Henderson

Dorothy Newton

Aggie

Herman

Police Chief Michael J. O'Brien

Arnold Hoffman

Migsy
Dan

Spike

Walter Stark

Director

Director
Story
Story
Screenplay
Screenplay
Screenplay
Producer
Editor
Editor
Editor
Editor
Editor
Stunts
Stunts

Stunts
Stunts

Stunts

Stunts
Director of Photography
Director of Photography