Trailer
 | Valentine Dyall as Dr. Morelle |
 | Julia Lang as Miss Frayle |
 | Jean Lodge as Cynthia Mason |
 | Philip Leaver as Samuel Kimber |
| Peter Drury as Peter Lorrimer |
 | Hugh Griffith as Bensall, the butler |
| Directing | |
| Godfrey Grayson | Director |
Writing | |
| Roy Plomley | Screenplay |
| Ambrose Grayson | Screenplay |
| Wilfred Burr | Theatre Play |
Costume & Make-Up | |
| Marjorie Green | Makeup Artist |
Production | |
| Anthony Hinds | Producer |
| Arthur Barnes | Production Manager |
Editing | |
| Ray Pitt | Editor |
Camera | |
| Peter Bryan | Camera Operator |
Sound | |
| Frank Spencer | Music Director |
| Rupert Grayson | Music Director |
Camera | |
| Cedric Williams | Director of Photography |
Sound | |
| Edgar Vetter | Sound |
Directing | |
| Bob Jones | Assistant Director |
