Characters played by Victor Jory
Spike Holland
Characters played by Iris Meredith
Valerie Howett
Characters played by James Craven
Abel Bellamy
Characters played by Robert Fiske
Savini
Characters played by Dorothy Fay
Elaine Bellamy
Characters played by Forrest Taylor
Parker Howett
Characters played by Jack Ingram
Brad - Henchman
Characters played by Joseph W. Girard
Inspector Ross
Characters played by Fred Kelsey
Capt. Thompson
Characters played by Kit Guard
Dinky Stone - Henchman
Radio Man
Characters played by George Lloyd
Henchman
Characters played by Jack Cheatham
Cop
Detective Charlie
Characters played by Edmund Cobb
Stevens
Agent 4-X
Thug Pilot
Characters played by Kernan Cripps
Frank
Characters played by Charles Dorety
Thug
Characters played by Kenne Duncan
Michael Bellamy
Characters played by John Elliott
Brewster
Characters played by Herbert Evans
Henderson
Characters played by Franklyn Farnum
Pete
Characters played by Al Ferguson
Butch
Characters played by Eddie Fetherston
Turk Martin
Characters played by Chuck Hamilton
Kardak
Characters played by Harry Harvey
Martin
Characters played by Edward Hearn
Cop
Characters played by Jack Hendricks
Lab Guard
Characters played by Lloyd Ingraham
Worthington
Characters played by Warren Jackson
Charlie - Theater Attendant
Characters played by John Paul Jones
Tinder
Characters played by Johnny Kascier
Jake
Characters played by Charles King
Cardoni
Characters played by Tom London
Detective with Shiner
Characters played by Sam Lufkin
Thug
Characters played by Mary MacLaren
Mrs. Patton
Characters played by Knox Manning
Narrator
Characters played by Bruce Mitchell
Cop
Characters played by Bud Osborne
Lanton
Characters played by Fred Parker
Train Conductor
Characters played by Constantine Romanoff
West
Characters played by Dick Rush
Cop
Characters played by Cy Schindell
Darcy
Characters played by Harry Tenbrook
Brunner
Characters played by Anthony Warde
Lefty Brent
Characters played by Duke York
Martel - aka Harry Madison
Characters played by Bert Young
Biff