"Karl Anton Verloc and his wife own a small cinema in a quiet London suburb where they live seemingly happily. But Mrs. Verloc does not know that her husband has a secret that will affect their relationship and threaten her teenage brother's life."
Sylvia Sidney
as Mrs. Verloc
Oskar Homolka
as Karl Verloc - Her Husband
Desmond Tester
as Stevie - Her Young Brother
John Loder
as Ted
Joyce Barbour
as Renee
Matthew Boulton
as Superintendent Talbot
S. J. Warmington
as Hollingshead
William Dewhurst
as The Professor
Clare Greet
as Mrs. Jones (uncredited)
Aubrey Mather
as Greengrocer (uncredited)
Austin Trevor
as Monocle Man (uncredited)
Charles Hawtrey
as Studious Youngster (uncredited)
Martita Hunt
as The Professor's Daughter (uncredited)
Torin Thatcher
as Mr. Verloc's Visitor (uncredited)
Peter Bull
Alfred Hitchcock
as Man Walking Past the Cinema as the Light Is Renewed
Joseph Conrad
Novel
Charles Bennett
Screenplay
Charles Frend
Editor
Director
Bernard Knowles
Director of Photography
Michael Balcon
Producer
Albert Jullion
Art Direction
Stephen Dade
Camera Operator
Albert Whitlock
Scenic Artist
Ivor Montagu
Associate Producer
Oscar Friedrich Werndorff
E. V. H. Emmett
Additional Dialogue
Jack Beaver
Music
Pen Tennyson
Assistant Director
Hubert Bath
Louis Levy
Marianne
Wardrobe Designer
Angelina Cameron
Sound Recordist
Joe Strassner
Costume Designer
Alma Reville
Continuity
Music Director
Walt Disney
Thanks
Helen Simpson
Dialogue
Ian Hay