Filmography
| Role | Title | Year | Character |
|---|---|---|---|
| Writer | Psycho | 1960 | |
| Writer | Psycho | 1998 | |
| Writer | Psycho II | 1983 | |
| Writer | Psycho IV: The Beginning | 1990 | |
| Writer | Die Zwangsjacke | 1964 | |
| Writer | Totentanz der Vampire | 1971 | |
| Writer | Asylum - Irrgarten des Schreckens | 1972 | |
| Writer | Asylum - Irrgarten des Schreckens | 1972 | |
| Writer | Der Schädel des Marquis de Sade | 1965 | |
| Writer | Abenteuer in Atlantis | 1978 | |
| Writer | Der Foltergarten des Dr. Diabolo | 1967 |