Director/a
Spencer Gordon Bennet
DIRECTOR/A
Fred C. Brannon
Reparto (por orden de créditos)
Bruce Edwards
Steve Colt
Virginia Lee
Joyce Winters
Carol Forman
Sombra, The Black Widow
Anthony Warde
Nick Ward
Ramsay Ames
Ruth Dayton
I. Stanford Jolley
Dr. Z.V. Jaffa
Theodore Gottlieb
Hitomu
Virginia Carroll
Dr. Ann Curry [Chs. 6-7]
Gene Roth
John M. Walker - Newspaper Editor
Sam Flint
Prof. Henry Weston
Tom Steele
Bard [Ch. 1]
Dale Van Sickel
Bill [Ch. 4]
LeRoy Mason
Dr. Godfrey [Ch. 5]
Forrest Taylor
Bradley (Gang Lawyer) [Ch. 10]
Ernie Adams
Blinky
Keith Richards
Michael Burns [Ch. 1]
John Alban
Triangulator Station Tech(uncredited)
Dave Anderson
Porter-Spy(uncredited)
Gordon Armitage
Detective(uncredited)
William Bailey
Morgue Attendant(uncredited)
Robert Barron
Link(uncredited)
George Chesebro
J. Carter(uncredited)
Arvon Dale
Dick Gordon
Reporter #2 at Demonstration(uncredited)
Duke Green
Ted Mills(uncredited)
Jerry Jerome
Reporter #1 at Demonstration(uncredited)
Frank Lackteen
A. Kabob(uncredited)
Harold Landon
Andy Baldwin(uncredited)
Robert Lawson
Pilot(uncredited)
Carey Loftin
Spike(uncredited)
Ted Mapes
Slade(uncredited)
Frank O'Connor
Police Inspector(uncredited)
Jack O'Shea
Finnegan(uncredited)
Gil Perkins
Burke(uncredited)
John Phillips
District Attorney Mark(uncredited)
Stanley Price
Filmore Hagen(uncredited)
Bob Reeves
Larry Steers
Dr. Harcourt(uncredited)
Laura Stevens
Trixie(uncredited)
Charles Sullivan
Cop with Ruth(uncredited)
Ken Terrell
Mendoza(uncredited)
Frank White
Lee(uncredited)
Robert J. Wilke
Cabbie(uncredited)
Bud Wolfe
Guard #1 on Cargo Plane(uncredited)
Peggy Wynne
Nurse McIntyre(uncredited)