(2008) The Rocker

as Gator

(2016) Wild Oats

as Vespucci

(2002) About Schmidt

as Larry Hertzel

(1992) Hot Chocolate

as Mr. Cassidy

(1971) Billy Jack

as Drama Teacher

(1976) Jackson County Jail

as David

(1983) Doctor Detroit

as Smooth Walker

(2009) Halloween II

as Uncle Meat

(2009) All About Steve

as Mr. Horowitz

(1980) John Ritter: Being of Sound Mind and Body

as Self / The Rock Doctor

(2022) Who Done It: The Clue Documentary

as Self (archive footage) (uncredited)

(2006) Man About Town

as Ben Giamoro

(1997) Gridlock'd

as Blind Man

(1977) Tail Gunner Joe

as Lt. Ted Cantwell

(2005) Crazy for Christmas

as Fred Nickells

(1981) Private Lessons

as Lester

(1992) Rubin & Ed

as Ed Tuttle

(1986) Heat

as Pinchus Zion

(1985) Clue

as The Chief (uncredited)

(1978) Loose Shoes

as Ernie Piles, War Correspondent

(1975) The Sunshine Boys

as Mr. Walsh, Commerical Director

(1981) Honky Tonk Freeway

as Snapper

(1986) My Chauffeur

as McBride

(1979) Americathon

as Kip Margolis

(2011) Salvation Boulevard

as Billy

(1997) On the 2nd Day of Christmas

as David

(1978) The Ghost of Flight 401

as Bert Stockwell

(1973) Steelyard Blues

as Frank Veldini

(1987) Inside Out

as Jack

(1990) Call Me Anna

as John Ross

(1976) Tunnel Vision

as Senator McMannus

(2012) Bigfoot

as Mayor Tommy Gillis

(1993) Little Miss Millions

as Nick Frost

(1987) Six Against the Rock

as Joseph 'Dutch' Cretzer

(1992) Quiet Killer

as Congressman Calvin Phillips

(2002) Teddy Bears' Picnic

as Ted Frye

(1991) Murder in New Hampshire: The Pamela Wojas Smart Story

as Paul Maggioto

(1988) The Diamond Trap

as Det. Rollings

(2005) Rockin' at the Red Dog: The Dawn of Psychedelic Rock

as narrator

(1980) Skyward

as Koup Trenton

(1977) Tarantulas: The Deadly Cargo

as Fred

(1975) The Blue Knight

as Resident

(1978) The Comedy Company

as Roger Dustleman

(1994) Munchie Strikes Back

as Munchie (voice)

(1993) Lethal Exposure

as Taylor Cochran

(1995) Out-of-Sync

as Det. Caldwell

(1979) You Can't Take it With You

as Wilbur C. Henderson

(1973) Jory

as Santa Rosa bartender

(1975) Prisoners

as ---

(1984) Mister Roberts

as Doc

(1976) Silent Movie

as Executive

(1978) Outside Chance

as David

(1980) Gridlock

as Señor Smooth (voice)

(2002) The Mesmerist

as ---

(2001) The Sky is Falling

as Yogi Cook

(1973) The Blue Knight

as ---

(1976) The Big Bus

as Jack

(1980) The Fantastic Funnies

as Dr. Johnny Fever

(1969) Some Kind of a Nut

as Bartender

(2016) Silver Skies

as Billy

(1986) The Princess Who Had Never Laughed

as King

(1984) This Is Spinal Tap

as Terry Ladd

(2016) A Christmas in Vermont

as Nick Harper

(1984) Silence of the Heart

as Carl Lewis

(1983) Motown 25: Yesterday, Today, Forever

as Johnny Caravella (Doctor Johnny Fever)

(1997) High Stakes

as Wayne Dreyer

(1984) Best Kept Secrets

as Jim Osborne

(1977) The Other Side of Midnight

as O'Brien

(2015) Thank You, Del: The Story of the Del Close Marathon

as Self

(1968) Petulia

as Hippie (uncredited)

(1986) Flight of the Navigator

as Dr. Louis Faraday

(1975) Shampoo

as Red Dog

(1975) Whiffs

as Dr. Gopian

(1982) One Shoe Makes it Murder

as Joe Hervey

(1975) Hustling

as Detective

(1985) Police Academy 2: Their First Assignment

as Pete Lassard

(1979) The Jerk

as Carnival Worker (uncredited)

(1969) A Session with the Committee

as (as Don Sturdy)

(2019) Valerie

as Self

(1982) Victims

as Charles Galloway

(1978) More Than Friends

as Avery Salminella

(2020) Life After The Navigator

as Himself

(2007) Martian Child

as Dr. Berg

(1973) Kid Blue

as Confectionary Man (as Howard Hessman)

(1972) Cisco Pike

as Recording Engineer

(1971) The Christian Licorice Store

as Last Party Guest

(1977) The Amazing Howard Hughes

as Jenks

(1987) Amazon Women on the Moon

as Rupert King (segment "Titan Man")

(2020) For Madmen Only: The Stories of Del Close

as Himself

(1998) That '70s Show

as Max

(1998) Two Guys and a Girl

as Mr. Bergen

(1984) Murder, She Wrote

as Sheldon Greenberg

(1960) The Andy Griffith Show

as Counter Boy

(2004) House

as Henry Errington

(1978) WKRP in Cincinnati

as Dr. Johnny Fever

(1974) Rhoda

as ---

(2006) Psych

as Barry Saunder

(2002) Boomtown

as Mel Castle

(2007) John from Cincinnati

as ---

(1994) Touched by an Angel

as Flynn Hodge

(1996) The Pretender

as Landlord

(1972) The Bob Newhart Show

as ---

(1975) One Day at a Time

as Sam Royer

(2001) Crossing Jordan

as Barney Reynolds

(1972) Sanford and Son

as ---

(1986) Head of the Class

as Charlie Moore

(1974) Firehouse

as ---

(1976) Laverne & Shirley

as ---

(1997) The Practice

as ---

(1982) Faerie Tale Theatre

as King

(1977) Soap

as Mr. Franklin

(1985) The Ray Bradbury Theater

as ---

(1994) ER

as Dr. James Broderick

(2004) Boston Legal

as Judge Robert Thompson

(1974) Harry O

as ---

(2003) Celebrities Uncensored

as Self

(1976) Battle of the Network Stars

as ---

(1975) Switch

as M.W.

(1991) The New WKRP in Cincinnati

as ---

(1999) Family Law

as Howard Thomas / Randall

(2000) Level 9

as ---

(1995) The Outer Limits

as Dr. Emory Taylor

(2001) Three Sisters

as Jerry Keats

(2001) Thieves

as ---

(1975) Saturday Night Live

as Self - Host

(1960) The Andy Griffith Show

as Harry

(2015) Chicago Med

as Clyde Glickman

(2009) Drop Dead Diva

as Cole Lamburt

(2015) Fresh Off the Boat

as Mr. Royce

(2000) CSI: Crime Scene Investigation

as Dr. Aden

(1967) The Smothers Brothers Comedy Hour

as Various

(1974) The Rockford Files

as Al Steever

(1972) The Bob Newhart Show

as Craig Plager

(1972) The Bob Newhart Show

as Augie (voice) (uncredited)

(1994) Burke's Law

as Chuck Mason

(1976) Quincy, M.E.

as D.A. Jerry Douglas

(1985) George Burns Comedy Week

as Andy Pace

(2010) Mike & Molly

as Otis

(1967) Mannix

as Ray Bennett