Directed by
| Anthony Kimmins | ||
Writing Credits
| Nigel Balchin | ... | (novel) |
| Nigel Balchin | ... | (screen play) |
Cast (in credits order) verified as complete
| Burgess Meredith | ... | Felix Milne | |
| Dulcie Gray | ... | Patricia Milne | |
| Michael Shepley | ... | Peter Edge | |
| Christine Norden | ... | Barbara Edge | |
| Kieron Moore | ... | Adam Lucian | |
 |
Barbara White | ... | Molly Lucian |
| Walter Fitzgerald | ... | Dr. Norris Pile | |
|
|
Edgar Norfolk | ... | Sir George Freethorne |
| John Laurie | ... | Dr. James Garsten | |
| Martin Miller | ... | Dr. Hans Tautz | |
| Clive Morton | ... | Robert Paston | |
| Joss Ambler | ... | Julian Briant | |
| Jack Raine | ... | Inspector Pierce | |
| Lawrence Hanray | ... | Dr. Lefage | |
| Helen Haye | ... | Lady Maresfield | |
| John Stuart | ... | Dr. John Hayling | |
|
|
Ronald Simpson | ... | Mr. Grandison |
| Gwynne Whitby | ... | Miss English | |
|
|
Malcolm Dalmayne | ... | Charlie Oakes |
| Rest of cast listed alphabetically: | |||
|
|
Robin Burns | ... | Onlooker (uncredited) |
| Michael Hordern | ... | Co-Counsel at Felix's Hearing (uncredited) | |
|
|
Jack Howarth | ... | Party Guest (uncredited) |
| Geoffrey Sumner | ... | Parkinson (uncredited) | |
Produced by
| Anthony Kimmins | ... | producer |
| Jack Kitchin | ... | producer |
Music by
| Benjamin Frankel | ||
Cinematography by
| Wilkie Cooper | ... | director of photography |
Editing by
| Richard Best | ||
Art Direction by
| William C. Andrews | ||
Costume Design by
| Alan Haines | ... | (costumes designed by) |
Makeup Department
| Eileen Bates | ... | hairdresser |
| John O'Gorman | ... | makeup artist |
Production Management
| Kenneth Horne | ... | production manager |
Second Unit Director or Assistant Director
| William Kirby | ... | assistant director |
| Jack Causey | ... | third assistant director (uncredited) |
| Guy Hamilton | ... | second assistant director (uncredited) |
Art Department
| Anne Head | ... | set dresser |
| Albert Witherick | ... | assistant art director |
Sound Department
| Alan Allen | ... | sound recordist |
| W.H.O. Sweeney | ... | sound supervisor (as William Sweeny) |
Special Effects by
| W. Percy Day | ... | special effects |
| Cliff Richardson | ... | special effects supervisor (uncredited) |
Visual Effects by
| W. Percy Day | ... | process shots (uncredited) |
| Ned Mann | ... | models (uncredited) |
Camera and Electrical Department
| Freddie Francis | ... | camera operator |
Editorial Department
| Derek Armstrong | ... | assistant editor (uncredited) |
Music Department
| Hubert Clifford | ... | conductor (as Dr. Hubert Clifford) |
Script and Continuity Department
| Winifred Dyer | ... | continuity |
| Angela Allen | ... | assistant continuity (uncredited) |
Additional Crew
| Alexander Korda | ... | presenter |
