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)
