Howard Hesseman

Who Done It: The Clue Documentary

Self (archive footage) (uncredited)

Life After The Navigator

Himself

For Madmen Only: The Stories of Del Close

Self

Valerie

Self

A Christmas in Vermont

Nick Harper

Wild Oats

Vespucci

Silver Skies

Billy

Chicago Med

Clyde Glickman

Thank You, Del: The Story of the Del Close Marathon

Self

Fresh Off the Boat

Mr. Royce

Bigfoot

Mayor Tommy Gillis

Salvation Boulevard

Billy

Mike & Molly

Otis

Halloween II

Uncle Meat

All About Steve

Mr. Horowitz

Drop Dead Diva

Cole Lamburt

Lie to Me

Sam Hendricks

The Rocker

Gator

Martian Child

Dr. Berg

John from Cincinnati

Erlemeyer

Psych

Barry Saunder

Man About Town

Ben Giamoro

Crazy for Christmas

Fred Nickells

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

narrator

House

Henry Errington

Boston Legal

Judge Robert Thompson

Celebrities Uncensored

Self

About Schmidt

Larry Hertzel

Boomtown

Mel Castle

The Mesmerist

Mr. Valdemar

Thieves

Crossing Jordan

Barney Reynolds

The Sky is Falling

Yogi Cook

Teddy Bears' Picnic

Ted Frye

Three Sisters

Jerry Keats

Level 9

CSI: Crime Scene Investigation

Dr. Aden

Family Law

Howard Thomas / Randall

That '70s Show

Max

Two Guys and a Girl

Mr. Bergen

On the 2nd Day of Christmas

David

High Stakes

Wayne Dreyer

The Practice

Judge C. Williams

Gridlock'd

Blind Man

The Pretender

Landlord

Innocent Victims

Smithline

Out-of-Sync

Det. Caldwell

The Outer Limits

Dr. Emory Taylor

Touched by an Angel

Flynn Hodge

ER

Dr. James Broderick

Munchie Strikes Back

Munchie (voice)

Burke's Law

Chuck Mason

Little Miss Millions

Nick Frost

Lethal Exposure

Taylor Cochran

Rubin & Ed

Ed Tuttle

Quiet Killer

Congressman Calvin Phillips

Hot Chocolate

Mr. Cassidy

Murder in New Hampshire: The Pamela Wojas Smart Story

Paul Maggioto

The New WKRP in Cincinnati

Call Me Anna

John Ross

The Diamond Trap

Det. Rollings

Amazon Women on the Moon

Rupert King (segment "Titan Man")

Inside Out

Jack

Six Against the Rock

Joseph 'Dutch' Cretzer

Heat

Pinchus Zion

Head of the Class

Charlie Moore

The Princess Who Had Never Laughed

King

Flight of the Navigator

Dr. Louis Faraday

My Chauffeur

McBride

Clue

The Chief (uncredited)

George Burns Comedy Week

Andy Pace

The Ray Bradbury Theater

Police Academy 2: Their First Assignment

Pete Lassard

Silence of the Heart

Carl Lewis

Murder, She Wrote

Sheldon Greenberg

Best Kept Secrets

Jim Osborne

Mister Roberts

Doc

This Is Spinal Tap

Terry Ladd

Focus on Fishko

Sy

Likely Stories, Vol. 4

Motown 25: Yesterday, Today, Forever

Self

Doctor Detroit

Smooth Walker

One Shoe Makes it Murder

Joe Hervey

Faerie Tale Theatre

King

Victims

Charles Galloway

Honky Tonk Freeway

Snapper

Private Lessons

Lester

Skyward

Koup Trenton

Gridlock

Señor Smooth (voice)

The Fantastic Funnies

Dr. Johnny Fever

John Ritter: Being of Sound Mind and Body

Self / The Rock Doctor

The Jerk

Carnival Worker (uncredited)

Americathon

Kip Margolis

You Can't Take it With You

Wilbur C. Henderson

More Than Friends

Avery Salminella

WKRP in Cincinnati

Dr. Johnny Fever

Loose Shoes

Ernie Piles, War Correspondent

The Comedy Company

Roger Dustleman

The Ghost of Flight 401

Bert Stockwell

Tarantulas: The Deadly Cargo

Fred

Soap

Mr. Franklin

The Other Side of Midnight

O'Brien

The Amazing Howard Hughes

Jenks

The Amazing Howard Hughes

Jenks

Tail Gunner Joe

Lt. Ted Cantwell

Battle of the Network Stars

Quincy, M.E.

D.A. Jerry Douglas

Delvecchio

Goldie

The Big Bus

Jack

Silent Movie

Executive

Jackson County Jail

David

Tunnel Vision

Senator McMannus

Laverne & Shirley

Mary Hartman, Mary Hartman

Dr. Robert Williams

One Day at a Time

Sam Royer

The Sunshine Boys

Mr. Walsh, Commerical Director

Whiffs

Dr. Gopian

Saturday Night Live

Self - Host

Switch

M.W.

Prisoners

The Blue Knight

Resident

Hustling

Detective

Shampoo

Red Dog

Baretta

Walker

The Rockford Files

Al Steever

Harry O

Senator Lawler

Rhoda

The Blue Knight

The Blue Knight

Jory

Santa Rosa bartender

Steelyard Blues

Frank Veldini

Kid Blue

Confectionary Man (as Howard Hessman)

The Bob Newhart Show

Craig Plager

Cisco Pike

Recording Engineer

Sanford and Son

The Christian Licorice Store

Last Party Guest

Billy Jack

Drama Teacher

Some Kind of a Nut

Bartender

A Session with the Committee

(as Don Sturdy)

Petulia

Hippie (uncredited)

Mannix

Ray Bennett

The Smothers Brothers Comedy Hour

Various

The Andy Griffith Show

Counter Boy