 | Madeleine Carroll als Elsa Carrington |
 | John Gielgud als Richard Ashenden / Edgar Brodie |
 | Peter Lorre als The General |
 | Robert Young als Robert Marvin |
 | Percy Marmont als Caypor |
 | Florence Kahn als Mrs. Caypor |
 | Charles Carson als "R" |
 | Lilli Palmer als Lilli |
| Denys Blakelock als Man (uncredited) |
 | Sebastian Cabot als Man (uncredited) |
 | Tom Helmore als Colonel Anderson (uncredited) |
| Andreas Malandrinos als Manager (uncredited) |
 | Howard Marion-Crawford als Karl (uncredited) |
 | Rène Ray als Maid (uncredited) |
 | Michael Redgrave als Army Officer (uncredited) |
 | Michael Rennie als Army Captain (uncredited) |
| Michel Saint-Denis als Coachman (uncredited) |
| Charles Frend | Editor |
| Albert Jullion | Set Dressing Artist |
| Bernard Knowles | Director of Photography |
| Alfred Hitchcock | Director |
| Charles Bennett | Screenplay |
| Hubert Bath | Music |
| Phillip Dorté | Sound Recordist |
| Stephen Dade | Camera Operator |
| Oscar Friedrich Werndorff | Art Direction |
| Campbell Dixon | Theatre Play |
| Ivor Montagu | Producer |
| W. Somerset Maugham | Novel |
| Michael Balcon | Producer |
| Joe Strassner | Costume Design |
| Jesse Lasky Jr. | Writer |
| Ian Hay | Writer |
| John Greenwood | Music |
| Louis Levy | Music Director |
| Pen Tennyson | Assistant Director |
| Albert Jullion | Set Dresser |
| Philip Dorté | Sound Recordist |
| Reg Johnson | Assistant Camera |
| Gerry Massy-Collier | Assistant Camera |
