Blackmail

Anny Ondra

Alice White

Sara Allgood

Mrs. White

Charles Paton

Mr. White

John Longden

Detective Frank Webber

Donald Calthrop

Tracy

Cyril Ritchard

The Artist

Hannah Jones

The Landlady

Harvey Braban

The Chief Inspector

Ex-Det. Sergt. Bishop

The Detective Sergeant

Alfred Hitchcock

Man on Subway (uncredited)

Johnny Ashby

Boy (uncredited)

Joan Barry

Alice White (voice) (uncredited)

Johnny Butt

Sergeant (uncredited)

Phyllis Konstam

Gossiping Neighbour (uncredited)

Sam Livesey

The Chief Inspector (silent version) (uncredited)

Phyllis Monkman

Gossip Woman (uncredited)

Percy Parsons

Crook (uncredited)

Alfred Hitchcock

Screenplay, Director

Jack E. Cox

Director of Photography

Emile de Ruelle

Editor

John Maxwell

Producer

Hubert Bath

Original Music Composer

Michael Powell

Writer

Jimmy Campbell

Original Music Composer

Reginald Connelly

Original Music Composer