Filmography
| Role | Title | Year | Character |
|---|---|---|---|
| Writer | Psicose | 1960 | |
| Writer | Psycho | 1998 | |
| Writer | Psycho IV: The Beginning | 1990 | |
| Writer | Two Bits | 1995 | |
| Actor | Going to Pieces: The Rise and Fall of the Slasher Film | 2006 | Himself |
| Writer | Eye of the Cat | 1969 | |
| Writer | The Black Orchid | 1958 | |
| Writer | The Kindred | 1987 | |
| Writer | The Naked Edge | 1961 |