Prof. Paul Bernardy
Paul Lukas
Jim Wyndham
Hugh Williams
Bit Part
Christine Lindsay
Student
Barbara Lott
Bernardy's Assistant (uncredited)
Charles Lloyd Pack
Director of Steel Company (uncredited)
John Rae
Man Serving in Snack Bar (uncredited)
Ben Williams
Helen Norwood Bernardy
Linden Travers
Martha Russell
Marie Ney
Marjorie
Renee Gadd
Gardener
Fred Withers
Coleman
Howard Douglas
Director of Steel Company
Fewlass Llewellyn
Chairman of Steel Company
Peter Gawthorne
Landlord
Norman Pierce
Director
Edmond T. Gréville
Cinematography
Ronald Neame
Henry Harris (non crédité)
Screenplay
Basil Mason