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