Known For
Supergirl
(1984)
Screenplay
Masters of the Universe
(1987)
Screenplay
The Dark Crystal
(1982)
Screenplay
Nate and Hayes
(1983)
Writer
Full Filmography
Writing
Cry Uncle!
(1971)
Screenplay
Dealing: Or the Berkeley-to-Boston Forty-Brick Lost-Bag Blues
(1972)
Writer
Between Time and Timbuktu
(1972)
Writer
Fore Play
(1975)
Writer
Running Scared
(1980)
Screenplay
The Dark Crystal
(1982)
Screenplay
Nate and Hayes
(1983)
Writer
Supergirl
(1984)
Screenplay
Gonzo Presents Muppet Weird Stuff
(1985)
Writer
Masters of the Universe
(1987)
Screenplay
The Very Best of the Muppet Show
(1999)
Writer
The Very Best of the Muppet Show: Volume 2
(1999)
Writer
The Very Best of the Muppet Show: Volume 3
(2001)
Writer
Acting
Cry Uncle!
(1971)
Angry Man in Parking Lot (uncredited)
Of Muppets & Men
(1981)
Self
Reflections of 'The Dark Crystal'
(2007)
Himself
Production
Directing