Diretor/a
Fred C. Brannon
DIRETOR/A
Elenco (na ordem dos créditos)
Kirk Alyn
Insp. David Worth
Rosemary La Planche
Laura Keith
Roy Barcroft
Spade Gordon
Carol Forman
Nila
James Dale
Agent Steve Evans
Bruce Edwards
Prof. Paul Williams [Chs. 1-6]
James Craven
Prof. James Clayton [Chs. 1, 10-12]
Tristram Coffin
Frank Chambers [Ch. 8]
Tom Steele
Grey - Henchman [Chs. 1-3]
Dale Van Sickel
Mac - Henchman
Jack O'Shea
Ali [Chs. 1, 10-12]
Marshall Reed
Det. O'Hara [Ch. 9]
Robert J. Wilke
Zod - Pursuit Plane Pilot [Chs. 10]
Robert St. Angelo
Native #3 [Ch. 11]
Dave Anderson
Porter [Ch. 9]
James Carlisle
Prof. Elwood M. Graves [Ch. 6]uncredited
John Daheim
Cave Guard #2 [Ch.11]uncredited
Art Dillard
Native #2 [Chs. 11-12]uncredited
George Douglas
Courieruncredited
Sol Gorss
Digger #1 [Chs. 1, 11-12]uncredited
Bert LeBaron
Warehouse Thug [Chs. 1-2, 10]uncredited
Carey Loftin
Ambulance Thug [Ch. 3]uncredited
Post Park
Headquarters Thug [Ch. 9]uncredited
Loren Riebe
Digger #2 [Chs. 1, 11-12]uncredited
David Sharpe
Native #4 [Ch. 11]uncredited
Duke Taylor
Roadblock Thug [Ch. 5]uncredited
Ken Terrell
Museum Thug [Ch. 6]uncredited
Bud Wolfe
Chemical Company Thug [Ch. 4]uncredited
Joe Yrigoyen