Tales from the Darkside
1984 · Writer
Masters of the Universe
1987 · Writer
Supergirl
1984 · Screenplay
Monsters
1988 · Writer
The Muppet Show
1976 · Writer
The Dark Crystal: Age of Resistance
2019 · Story
The Dark Crystal
1982 · Screenplay
Fore Play
1975 · Writer
Nate and Hayes
1983 · Writer
The Yattering And Jack
1987 · Director
Gonzo Presents Muppet Weird Stuff
1985 · Writer
Running Scared
1980 · Screenplay
Martians Go Home
1989 · Director
Cry Uncle!
1971 · Angry Man in Parking Lot (uncredited)
Dealing: Or the Berkeley-to-Boston Forty-Brick Lost-Bag Blues
1972 · Writer
The Very Best of the Muppet Show
1999 · Writer
The Very Best of the Muppet Show: Volume 2
Between Time and Timbuktu
