2001

… Writer

1999		The Very Best of the Muppet Show: Volume 2 … Writer
1999		The Very Best of the Muppet Show … Writer

1987

… Screenplay

1985

… Writer

1984

… Screenplay

1983

… Writer

1982

… Screenplay

1980

… Screenplay

1975

… Writer

1972		Between Time and Timbuktu … Writer
1972		Dealing: Or the Berkeley-to-Boston Forty-Brick Lost-Bag Blues … Writer

1971

… Screenplay

2007

as Himself

1981

as Self

1971

as Angry Man in Parking Lot (uncredited)

1990

… Director

1987

… Director

1961

… Producer