Kent Taylor as Ted O'Hara

Jane Hylton as Joan Butler

Kathleen Byron as Renee L'Epine

Karl Stepanek as Zelinsky

Frederick Valk as Otto Weber

Maurice Kaufmann as Dan Flemying

Martin Boddey as Squire Marlowe, the Wrestler

Arthur Lane as Bob Hendon

Hugo Schuster as Professor Henrik

John Boxer as Inspector Dalton

Michael Ripper as Bill Rymer

Michael Balfour as Stevens

Alexander Field as Train Porter

Vivienne Martin as Lola

John Warren as Bargee

Fred Griffiths as Gymnasium Attendant

Terence Brook as Man on Sofa

Patrick Dowling as First Reporter

Arthur Bentlet as Second Reporter