Cast and crew
Blackmail (1929)
17 cast and 22 crew, as credited. Cast in billing order; crew by department.
Cast17
Anny OndraAlice White
Sara AllgoodMrs. White
Charles PatonMr. White
John LongdenDetective Frank Webber
Donald CalthropTracy
Cyril RitchardThe Artist
Hannah JonesThe Landlady
Harvey BrabanThe Chief Inspector- Ex-Det. Sergt. BishopThe Detective Sergeant
Alfred HitchcockMan on Subway (uncredited)- Johnny AshbyBoy (uncredited)
Joan BarryAlice White (voice) (uncredited)- Johnny ButtSergeant (uncredited)
- Phyllis KonstamGossiping Neighbour (uncredited)
- Sam LiveseyThe Chief Inspector (silent version) (uncredited)
- Phyllis MonkmanGossip Woman (uncredited)
- Percy ParsonsCrook (uncredited)
Crew22
Directing
- Alfred HitchcockDirector
- Frank MillsAssistant Director
Writing
- Alfred HitchcockScreenplay
- Michael PowellWriter
- Charles BennettTheatre Play
- Benn W. LevyDialogue
Production
- John MaxwellProducer
Camera
- Jack E. CoxDirector of Photography
- Derick WilliamsAssistant Camera
- Ronald NeameAssistant Camera
- Michael PowellAssistant Camera
Editing
- Emile de RuelleEditor
Sound and music
- Dallas BowerSound Recordist
- Hubert BathOriginal Music Composer, Music Arranger
- Harry MillerSound Editor
- Harold V. KingSound
- Reginald ConnellyOriginal Music Composer
- John ReyndersConductor
- Jimmy CampbellOriginal Music Composer
- Harry StaffordMusic Arranger
Art
- C. Wilfred ArnoldArt Direction
- Norman G. ArnoldArt Direction