Drehbuchautor bei
| 1998 | Psycho | ||
| 1990 | Psycho IV: The Beginning | ||
| 1986 | Psycho III | ||
| 1983 | Psycho II | ||
| 1973 | The Cat Creature | ||
| 1972 | Asylum -Irrgarten des Schreckens | ||
| 1971 | Totentanz der Vampire | ||
| 1967 | Der Foltergarten des Dr. Diabolo | ||
| 1967 | The Deadly Bees | ||
| 1966 | The Psychopath | ||
| 1965 | Der Schädel des Marquis de Sade | ||
| 1964 | Er kam nur nachts | ||
| 1964 | Die Zwangsjacke | ||
| 1962 | The Couch | ||
| 1962 | The Cabinet of Caligari | ||
| 1960 | Psycho | ||
| Journey to Midnight | |||
| Abenteuer in Atlantis |
mitgespielt in
| 2007 | Spine Tingler! The William Castle Story | ||
| 2000 | The Fantasy Film Worlds of George Pal |