Cast & crew
Blackmail (1929)
Directed by Alfred Hitchcock Written by Alfred Hitchcock, Michael Powell
Cast
| Sara Allgood | Mrs. White |
| Anny Ondra | Alice White |
| Cyril Ritchard | The Artist |
| Hannah Jones | The landlady |
| Charles Paton | Mr. White |
| John Longden | Detective Frank Webber |
| Donald Calthrop | Tracy |
| Harvey Braban | The Chief Inspector |
| Alfred Hitchcock | Man on Subway (uncredited) |
| Ex-Det. Sergt. Bishop | The Detective Sergeant |
| Johnny Ashby | Boy (uncredited) |
| Joan Barry | Alice White (voice) (uncredited) |
| Johnny Butt | Sergeant (uncredited) |
| Phyllis Konstam | Gossiping Neighbour (uncredited) |
| Percy Parsons | Crook (uncredited) |
| Sam Livesey | The Chief Inspector (silent version) (uncredited) |
| Phyllis Monkman | Gossip Woman (uncredited) |
Crew
| Emile de Ruelle | Editor |
| C. Wilfred Arnold | Art Direction |
| Alfred Hitchcock | Screenplay |
| Alfred Hitchcock | Director |
| Jack E. Cox | Director of Photography |
| Hubert Bath | Original Music Composer |
| Norman G. Arnold | Art Direction |
| Dallas Bower | Sound Recordist |
| Harry Miller | Sound Editor |
| John Maxwell | Producer |
| Derick Williams | Assistant Camera |
| Ronald Neame | Assistant Camera |
| Michael Powell | Assistant Camera |
| Harold V. King | Sound |
| Reginald Connelly | Original Music Composer |
| Frank Mills | Assistant Director |
| Charles Bennett | Theatre Play |
| John Reynders | Conductor |
| Michael Powell | Writer |
| Jimmy Campbell | Original Music Composer |
| Harry Stafford | Music Arranger |
| Hubert Bath | Music Arranger |
| Benn W. Levy | Dialogue |