Filmography
| Role | Title | Year | Character |
|---|---|---|---|
| Writer | Psycho | 1960 | |
| Writer | Psycho | 1998 | |
| Writer | Psycho IV: The Beginning | 1990 | |
| Writer | 25 Cents | 1995 | |
| Actor | Going to Pieces | 2006 | Himself |
| Writer | Grüne Augen in der Nacht | 1969 | |
| Writer | Die schwarze Orchidee | 1958 | |
| Writer | Anthony | 1987 | |
| Writer | Ein Mann geht seinen Weg | 1961 |