"Before the outbreak of WWII, Nazi sympathizers plot to undermine America."
Milburn Stone
as Agent Tom Brant
Jan Wiley
as Janet Lowe
Dennis Moore
as Jack Ryan
Addison Richards
as Gerhard Doenitz / Garret Donahue
Byron Foulger
as Prof. Elwood Henderson
Maris Wrixon
as Dorothy Newton
Sarah Padden
as Aggie
George Lynn
as Herman
Russell Hicks
as Police Chief Michael J. O'Brien
Roland Varno
as Arnold Hoffman
Lash LaRue
as Migsy
Jerry Shane
as Dan
Neyle Morrow
as Spike
John Eldredge
as Walter Stark
Lewis D. Collins
Director
Morgan Cox
Producer
David Sharpe
Stunts
Ray Taylor
Dwight V. Babcock
Story
Jack Natteford
Dale Van Sickel
Ace Herman
Editor
Edgar Zane
Irving Birnbaum
Jack Dolan
Ken Terrell
Chuck Hamilton
Carl Mathews
Joseph O'Donnell
Screenplay
George H. Plympton
Alvin Todd
Tom Steele
Ande Lamb
William A. Sickner
Director of Photography
Maury Gertsman
