Directing

2009

… Director

2005

… Director

2002

… Director

2000

… Director

1999

… Director

1996

… Director

1995

… Director

1993

… Director

1986

… Director

1983

… Director

1980

… Director

Acting

2021

as Dr. Egon Spengler (archive footage) (uncredited)

2020		Belushi as Self (archive footage)
2020		Cleanin' Up the Town: Remembering Ghostbusters as Self

2015		Thank You, Del: The Story of the Del Close Marathon as Self
2015		Drunk Stoned Brilliant Dead: The Story of the National Lampoon as Self / Film Director (archive footage)

2011

as Self

2009		Caddyshack: The Inside Story as Himself
2009		Year One as Adam

2008

as Self

2007		Walk Hard: The Dewey Cox Story as L'Chai'm
2007		Students of 'The Graduate' as Self
2007		Knocked Up as Ben's Dad

2006

as Professor Bowler

2004

as Self

2002		I'm with Lucy as Jack
2002		Groundhog Day: The Weight of Time as Self
2002		Orange County as Don Durkett

1999		Ghostbusters 1999 as Self
1999		Caddyshack: The 19th Hole as Self - Director

1998

as Self - Writer

1997

as Dr. Bettes

1994		Love Affair as Sheldon Blumenthal
1994		Airheads as Chris Moore

1993

as Neurologist

1990

as Elon Spengler

1989

as Dr. Egon Spengler

1988		The Best of SCTV
1988		Stealing Home as Alan Appleby

1987

as Steven Buchner

1985

as Self

1984

as Egon Spengler

1983		The Rodney Dangerfield Special: I Can't Take It No More as Self / Various
1983		National Lampoon's Vacation as Car salesman (voice) (uncredited)
1983		Spacehunter: Adventures in the Forbidden Zone as Voice (Uncredited)

1981		Heavy Metal as Zeke (voice)
1981		Stripes as Russell Ziskey

Writing

2024

… Original Film Writer

2021

… Original Film Writer

2016

… Characters

2009

… Screenplay

2004

… Original Film Writer

2002

… Screenplay

2000

… Screenplay

1999

… Screenplay

1993

… Screenplay

1991

… Story

1989

… Characters … Screenplay

1988		The Best of SCTV … Writer
1988		Caddyshack II … Characters … Screenplay

1986		Meatballs III: Summer Job … Characters
1986		Armed and Dangerous … Screenplay
1986		Club Paradise … Screenplay
1986		Back to School … Screenplay

1984

… Screenplay

1982

… Writer

1981

… Screenplay

1980

… Writer

1979

… Writer

1978

… Writer

Production

2009		Year One … Producer
2009		My Suicide … Executive Producer

2006

… Executive Producer

2000

… Producer

1996

… Producer

1993

… Producer

1986

… Executive Producer