 Kalkuliertes Risiko1997 · Writer | Writer |
 The Eyes of the Panther1989 · Writer | Writer |
| CCharlie and the Great Balloon Chase1981 · Writer | Writer |
 The Forgotten City of the Planet of the Apes1980 · Writer | Writer |
 Back to the Planet of the Apes1980 · Writer | Writer |
 The World Beyond1978 · Writer | Writer |
 A Gift of Terror1973 · Writer | Writer |
 She Waits1972 · Writer | Writer |
 A Tattered Web1971 · Writer | Writer |
