Kent Taylor
— Ted O'Hara
Jane Hylton
— Joan Butler
Kathleen Byron
— Renee L'Epine
Karl Stepanek
— Zelinsky
Frederick Valk
— Otto Weber
Maurice Kaufmann
— Dan Flemying
Martin Boddey
— Squire Marlowe, the Wrestler
Arthur Lane
— Bob Hendon
Hugo Schuster
— Professor Henrik
John Boxer
— Inspector Dalton
Michael Ripper
— Bill Rymer
Michael Balfour
— Stevens
Alexander Field
— Train Porter
Vivienne Martin
— Lola
John Warren
— Bargee
Fred Griffiths
— Gymnasium Attendant
Terence Brook
— Man on Sofa
Patrick Dowling
— First Reporter
Arthur Bentlet
— Second Reporter