Londen, 1929. Frank Webber, een zeer drukke Scotland Yard detective, lijkt meer geïnteresseerd te zijn in zijn werk dan in Alice White, zijn vriendin. Alice voelt zich genegeerd en gaat uit met een elegante en welgemanierde kunstenaar die haar uitnodigt in zijn chique appartement.
Nee, helaas is Blackmail nog niet beschikbaar op Netflix in Nederland.
| Editing | Emile de Ruelle | Editor |
| Art | C. Wilfred Arnold | Art Direction |
| Writing | Alfred Hitchcock | Screenplay |
| Camera | Jack E. Cox | Director of Photography |
| Directing | Alfred Hitchcock | Director |
| Sound | Hubert Bath | Original Music Composer |
| Art | Norman G. Arnold | Art Direction |
| Sound | Harry Miller | Sound Editor |
| Production | John Maxwell | Producer |
| Sound | Dallas Bower | Sound Recordist |
| Camera | Derick Williams | Assistant Camera |
| Sound | Harold V. King | Sound |
| Camera | Ronald Neame | Assistant Camera |
| Camera | Michael Powell | Assistant Camera |
| Directing | Frank Mills | Assistant Director |
| Writing | Michael Powell | Writer |
| Writing | Charles Bennett | Theatre Play |
| Sound | Reginald Connelly | Original Music Composer |
| Sound | John Reynders | Conductor |
| Sound | Harry Stafford | Music Arranger |
| Sound | Jimmy Campbell | Original Music Composer |
| Writing | Benn W. Levy | Dialogue |
| Sound | Hubert Bath | Music Arranger |
