Werner Krauss, who had played the deranged Dr. Caligari six years earlier, stars as a scientist who is tormented by an irrational fear of knives and the irresistible compulsion to murder his wife. Driven to the brink of madness by fantastic nightmares (designed by Ernö Metzner and photographed by Guido Seeber in a brilliant mix of expressionism and surrealism), he encounters a psychoanalyst who offers to treat the perplexing malady.
Unfortunately the movie Secrets of a Soul is not yet available on HBO Max.
| Writing | Hans Neumann | Writer |
| Directing | G.W. Pabst | Director |
| Writing | Hanns Sachs | Writer |
| Writing | Karl Abraham | Writer |
| Writing | Colin Ross | Writer |
| Art | Ernö Metzner | Art Direction |
| Production | Hans Neumann | Producer |
| Camera | Curt Oertel | Director of Photography |
| Production | Richard Ortlieb | Production Manager |
| Camera | Guido Seeber | Director of Photography |
| Camera | Robert Lach | Director of Photography |
| Sound | Giuseppe Becce | Original Music Composer |
| Directing | Marc Sorkin | Assistant Director |
