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