London, 1929. Frank Webber, a very busy Scotland Yard detective, seems to be more interested in his work than in Alice White, his girlfriend. Feeling herself ignored, Alice agrees to go out with an elegant and well-mannered artist who invites her to visit his fancy apartment.
Unfortunately the movie Blackmail is not yet available on HBO Max.
| 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 |
