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