 | Ann Todd als Mary Justin |
 | Claude Rains als Howard Justin |
 | Trevor Howard als Prof. Steven Stratton |
 | Betty Ann Davies als Joan Layton |
 | Isabel Dean als Pat Stratton |
 | Wilfrid Hyde-White als Lawyer |
 | Arthur Howard als Smith - the Butler |
 | Guido Lorraine als Hotel Manager |
 | Marcel Poncin als Hall Porter |
| Natasha Sokolova als Chambermaid |
| Hélène Burls als Flowerwoman |
 | John Serret als Emigration Official |
| Frances Waring als Charwoman |
| Wenda Rogerson als Bridge Guest |
| Helen Piers als 1st Woman - Albert Hall |
| Ina Pelly als 2nd Woman - Albert Hall |
| David Lean | Director |
| Richard Addinsell | Original Music Composer |
| David Lean | Adaptation |
| H.G. Wells | Novel |
| Stanley Haynes | Adaptation |
| Biddy Chrystal | Hairstylist |
| Ronald Neame | Producer |
| Guy Green | Director of Photography |
| Clive Donner | Editor |
| Eric Ambler | Producer |
| Geoffrey Foot | Editor |
| Jack Harris | Editor |
| Margaret Furse | Costume Design |
| George Pollock | Assistant Director |
| Winston Ryder | Sound Editor |
| Maggie Unsworth | Continuity |
| Gordon K. McCallum | Sound Recordist |
| T. Hopewell Ash | Assistant Art Director |
| Stanley Lambourne | Sound Recordist |
| Muir Mathieson | Conductor |
| Oswald Morris | Camera Operator |
| Eric Ambler | Screenplay |
| Norman Spencer | Associate Producer |
| John Bryan | Set Designer |
