2009

… Story

1997

… Writer

1989

… Writer

1981

… Writer

1980		The Forgotten City of the Planet of the Apes … Writer
1980		Back to the Planet of the Apes … Writer

1978

… Writer

1977

… Teleplay

1973		The Haunting of Rosalind … Teleplay
1973		A Gift of Terror … Writer

1972

… Writer

1971		A Tattered Web … Writer
1971		Dr. Cook's Garden … Teleplay

1971

1977

… Creator