 | Sylvia Sidney als Mrs. Verloc |
 | Oskar Homolka als Karl Verloc - Her Husband |
 | Desmond Tester als Stevie - Her Young Brother |
 | John Loder als Ted |
 | Joyce Barbour als Renee |
 | Matthew Boulton als Superintendent Talbot |
 | S. J. Warmington als Hollingshead |
 | William Dewhurst als The Professor |
 | Clare Greet als Mrs. Jones (uncredited) |
 | Aubrey Mather als Greengrocer (uncredited) |
 | Austin Trevor als Monocle Man (uncredited) |
 | Charles Hawtrey als Studious Youngster (uncredited) |
 | Martita Hunt als The Professor's Daughter (uncredited) |
 | Torin Thatcher als Mr. Verloc's Visitor (uncredited) |
 | Peter Bull als Mr. Verloc's Visitor (uncredited) |
 | Alfred Hitchcock als Man Walking Past the Cinema as the Light Is Renewed |
| Charles Bennett | Screenplay |
| Bernard Knowles | Director of Photography |
| Charles Frend | Editor |
| Joseph Conrad | Novel |
| Alfred Hitchcock | Director |
| E. V. H. Emmett | Additional Dialogue |
| Oscar Friedrich Werndorff | Art Direction |
| Marianne | Wardrobe Designer |
| Walt Disney | Thanks |
| Alma Reville | Continuity |
| Louis Levy | Music Director |
| Angelina Cameron | Sound Recordist |
| Joe Strassner | Costume Designer |
| Helen Simpson | Dialogue |
| Ian Hay | Dialogue |
| Ivor Montagu | Associate Producer |
| Albert Whitlock | Scenic Artist |
| Stephen Dade | Camera Operator |
| Albert Jullion | Art Direction |
| Michael Balcon | Producer |
| Jack Beaver | Music |
| Hubert Bath | Music |
| Louis Levy | Music |
| Pen Tennyson | Assistant Director |
