Bela Lugosi
Dr. Alex Zorka / Dr. Zane
Robert Kent
Capt. Bob West
Dorothy Arnold
Jean Drew
Edwin Stanley
Dr. Fred Mallory
Regis Toomey
Lt. Jim Daly
Jack C. Smith
Monk
Edward Van Sloan
Jarvis
Dora Clement
Ann Zorka
Anthony Averill
Rankin
Hugh Huntley
Perkins
Frank Mayo
Train Engineer
Jim Farley
Skipper
Eddie Acuff
Mac
Reed Howes
Signalman
Ed Wolff
The Robot
Hooper Atchley
Experimental Lab Tech
Roy Barcroft
AMI Agent Parker
Robert Blair
Smith
Al Bridge
White Rose Sailor
Don Brodie
Thug
Lane Chandler
Henchman with Rankin
Edmund Cobb
Army Sergeant
Lee J. Cobb
Road Crew Foreman (archive footage)
Eddie Dunn
Policeman
Jerry Frank
Henchman with Rankin
Karl Hackett
Brown
Charles King
Cop
George Magrill
Thug-Pilot / Schooner Crewman
Monte Montague
Airplane Mechanic
Pat O'Malley
AMI Chief
David Sharpe
Schooner Sailor
Tom Steele
Train Conductor / Radio Truck Driver
Forrest Taylor
Black
Harry Wilson
Schooner Crewman