Robert Picardo

Star Trek: Starfleet Academy

The Doctor

Quantum Leap

Dr. Edwin Woolsey

Star Trek: Prodigy

The Doctor (voice)

CSI: Vegas

Carlo Rey

Star Trek Day

Self

Stars in the House

Self

Mythic Quest

Principal Taggart

Station 19

Mr. Nelligan

Young Sheldon

Professor Salzman

The Orville

Ildis Kitan

The Good Fight

Arbiter Alan Mannheim

Justice League Action

Harvey Dent / Two-Face (voice)

Lucifer

Yuri

The Flash

Dexter Myles

Perception

A. Z. Weyland

The Client List

Judge Hughes

Jessie

Cyril Lipton

Happy Endings

Mr. Logan

Body of Proof

Henry Pedroni

Harry's Law

Annie's Psychiatrist

Hawaii Five-0

C.I.A. Man

Justified

Karl Hanselman

Stargate Universe

Richard Woolsey

Castle

Clark Murray

The Mentalist

Jason Cooper

Women's Murder Club

2007

Pushing Daisies

Detective Puget

Chuck

Perseus

Ben 10

Leader Alien (voice)

Masters of Horror

2005

Bones

Dr. Lawrence Rozran

Supernatural

Wayne Whittaker Jr.

The Closer

Mr. Sheffield

Grey's Anatomy

Mr. Nelligan

CSI: NY

Sheriff Benson

Stargate Atlantis

Richard Woolsey

The 4400

Trent Appelbaum

Cold Case

Arthur Lennox

NCIS

Dale Harding

The O.C.

Bill Merriam

The Dead Zone

Mitch McMurtry

Justice League

Amazo (voice)

Smallville

Edward Teague

Crossing Jordan

Bruno Casnelli

The West Wing

E. Bradford Shelton

Cow and Chicken

President / Puppet President (voice)

Ally McBeal

Barry Philbrick

Stargate SG-1

Richard Woolsey

The Practice

Dr. Edmunds

Early Edition

Doctor

Sabrina, the Teenage Witch

Bob Jacobs

Dumb and Dumber

Cook (voice)

Star Trek: Voyager

The Doctor

ER

Abraham Zimble

Frasier

Charlie Koechner

Star Trek: Deep Space Nine

Dr. Lewis Zimmerman / EMH Mark I

Batman: The Animated Series

Eddie G. (voice)

Home Improvement

Joe Morton

Dinosaurs

Muse (voice)

Tales from the Crypt

Frank Bobo

The Wonder Years

Coach Cutlip

21 Jump Street

Ralph Buckley

L.A. Law

John Dunphy

Amazing Stories

Tony Sepulveda

The Golden Girls

Dr. Revell

St. Elsewhere

Eli Muzzy

It Takes Two

1982

Newhart

1982

Taxi

Philip Polevoy

Alice

1976