Filmography
| Role | Title | Year | Character |
|---|---|---|---|
| Writer | Psicose | 1960 | |
| Writer | Psycho | 1998 | |
| Writer | Psicose: 2ª Parte | 1983 | |
| Writer | Psycho IV: The Beginning | 1990 | |
| Writer | Strait-Jacket | 1964 | |
| Writer | The House That Dripped Blood | 1971 | |
| Writer | Asylum | 1972 | |
| Writer | Asylum | 1972 | |
| Writer | The Skull | 1965 | |
| Writer | The Amazing Captain Nemo | 1978 | |
| Writer | Torture Garden | 1967 |