"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
George H. Plympton
Screenplay
Ray Taylor
Director
Jack Natteford
Story
Joseph O'Donnell
David Sharpe
Stunts
Ace Herman
Editor
Irving Birnbaum
Ken Terrell
Dale Van Sickel
Carl Mathews
Jack Dolan
Lewis D. Collins
Edgar Zane
Chuck Hamilton
Ande Lamb
Alvin Todd
Tom Steele
Dwight V. Babcock
Morgan Cox
Producer
Maury Gertsman
Director of Photography
William A. Sickner
