Anglo Amalgamated Film Distributors Limited ; Michael Relph's & Basil Dearden's production ; original screenplay by James Kennaway ; produced by Michael Relph ; directed by Basil Dearden
Gaumont Pictures, Diamond Entertainment Corporation, TGG Direct ; produced by Michael Balcon, Ivor Montagu ; screenplay by Charles Bennett, Ian Hay, Alma Reville ; directed by Alfred Hitchcock
Studio Canal ; London Independent Producers present a Joseph Losey production ; screenplay, Harold Pinter ; producers, Joseph Losey, Norman Priggen ; director, Joseph Losey