Writing

2001

Druids … Screenplay

1998

The Barber of Siberia … Writer

1985

The Emerald Forest … Screenplay

1981

Excalibur … Screenplay … Adaptation

1977

Exorcist II: The Heretic … Writer

Directing

1989

Cutting Class … Director

1977

Exorcist II: The Heretic … Second Unit Director

Crew

1972

Deliverance … Creative Consultant