Diretor/a
Ford Beebe
DIRETOR/A
Saul A. Goodkind
Elenco (na ordem dos créditos)
Bela Lugosi
Dr. Alex Zorka
Robert Kent
Capt. Bob West
Dorothy Arnold
Jean Drew
Edwin Stanley
Dr. Fred Mallory
Regis Toomey
Jim Daly
Jack C. Smith
Monk
Edward Van Sloan
Jarvis [Chs. 2-12]
Dora Clement
Ann Zorka [Chs. 1-2]
Anthony Averill
Rankin - Henchman [Chs. 2-12]
Hugh Huntley
Perkins - Mallory's Lab Assistant [Chs. 2-12]
Monte Vandergrift
Al - Guard [Ch. 5]
Frank Mayo
Train Engineer [Ch. 6]
Jim Farley
Skipper [Ch. 9]
Eddie Acuff
Mac - AMI Agent [Chs. 2-12]
Reed Howes
Signalman [Ch. 10]
Ed Wolff
The Robot
Hooper Atchley
Experimental Lab Tech(uncredited)
Roy Barcroft
Parker - AMI Agent(uncredited)
Robert Blair
Smith(uncredited)
Al Bridge
White Rose Sailor(uncredited)
Don Brodie
Thug(uncredited)
Lane Chandler
Henchman with Rankin(uncredited)
Edmund Cobb
Army Sergeant(uncredited)
Lee J. Cobb
Road Crew Foreman(uncredited)(archiveFootage)
Eddie Dunn
Policeman(uncredited)
Jerry Frank
Karl Hackett
Brown(uncredited)
Charles King
Cop(uncredited)
George Magrill
Thug-Pilot(uncredited)
Monte Montague
Airplane Mechanic(uncredited)
Pat O'Malley
AMI Chief(uncredited)
David Sharpe
Schooner Sailor(uncredited)
Tom Steele
Train Conductor(uncredited)
Forrest Taylor
Black(uncredited)
Harry Wilson
Schooner Crewman(uncredited)