Trailer
 | Robert Beatty as Dr. Paul Rankin |
 | Mervyn Johns as Dr. Bruckner, the Beast of Ravensbruck |
 | Margaretta Scott as Sister 'Johnnie' Johnson |
 | Nova Pilbeam as Tracy Heart |
 | Sybilla Binder as Martha Lert |
| Marie Lohr as Mrs. Cole |
 | Karl Stepanek as Professor Inman |
 | Alan Wheatley as M. W. Kennedy |
| Production | |
| Louis H. Jackson | Producer |
Sound | |
| Hans May | Original Music Composer |
Writing | |
| Jack Whittingham | Writer |
Directing | |
| Paul L. Stein | Director |
Costume & Make-Up | |
| A. G. Scott | Hairstylist |
Sound | |
| Eva Catchpole | Sound Editor |
Writing | |
| Guy Morgan | Original Story |
Camera | |
| Moray Grant | Camera Operator |
Costume & Make-Up | |
| L.M. Tweedy | Wardrobe Supervisor |
Sound | |
| Harold V. King | Recording Supervision |
Directing | |
| Leigh Aman | Assistant Director |
Costume & Make-Up | |
| Henry Hayward | Makeup Artist |
Editing | |
| Joseph Sterling | Editor |
