Reparto y equipo

Alfred Hitchcock

Sylvia Sidney Mrs. Verloc

Oskar Homolka Karl Verloc - Her Husband

Desmond Tester Stevie - Her Young Brother

John Loder Ted

Joyce Barbour Renee

Matthew Boulton Superintendent Talbot

S. J. Warmington Hollingshead

William Dewhurst The Professor

Clare Greet Mrs. Jones (uncredited)

Aubrey Mather Greengrocer (uncredited)

Austin Trevor Monocle Man (uncredited)

Charles Hawtrey Studious Youngster (uncredited)

Martita Hunt The Professor's Daughter (uncredited)

Torin Thatcher Mr. Verloc's Visitor (uncredited)

Peter Bull Mr. Verloc's Visitor (uncredited)

Michael Balcon

Bernard Knowles

Charles Frend