Cast & creator
Peter MacKenzie
Best known for The Mentalist, Grey's Anatomy, CSI: Crime Scene Investigation
Peter MacKenzie (born January 19, 1961) is an American actor. In 1979, Peter took acting lessons in New York. He worked at a talent agency before deciding to work as an actor full time in 1984. His first major role was on Herman's Head. He is a character actor. He also played "Mr. Firestein" in the season 3 episode of The Drew Carey Show titled "The Sex Drug", as Mimi Bobeck's counsel in her sex harassment case against Nigel Wick, and co-starred in the 1987 film Firehouse. One of his minor roles was Mr. Sneed in Disney's Tom and Huck. He plays anti-war activist David Dellinger in the 2012 film The Chicago 8.
Also known as: Peter Mackenzie
37
film credits
79
television credits
113
1985–2026 · acting roles
6.9
average across scored titles
Signature credits
Known for
Across film & television
Filmography (116)
Showing 116 of 116 credits
The Mentalist
Holman Perry
2008
Grey's Anatomy
Warren Kramer
2005
CSI: Crime Scene Investigation
Dr. Eisling
2000
American Dad!
Dr. Grossbard / Senator #1 (voice)
2005American Dad!
Judge (voice)
2005American Dad!
(voice)
2005American Dad!
Michael (voice)
2005American Dad!
Chief Shopaholic / Midnight Runner #1 / Salesman (voice)
2005American Dad!
Surgeon (voice)
2005American Dad!
Fat Kid's Dad (voice)
2005American Dad!
Wedding Officiant (voice)
2005American Dad!
Mr. Minor (voice)
2005
Criminal Minds
2005Criminal Minds
Jack Fisher
2005
NCIS
Jack Murdoch
2003
Bones
Congressman Efran Hadley
2005
Castle
Sergeant Roman
2009
CSI: Miami
Russell Tanninger
2002
The West Wing
George Rohr - American Christian Assembly
1999
Gilmore Girls
Dr. Schultz
2000
How I Met Your Mother
Mr. Horvath
2005
It's Always Sunny in Philadelphia
Doctor
2005
Curb Your Enthusiasm
Man in shorts
2000
2 Broke Girls
Devon
2011
Mad Men
Cliff Perry
2007
Scandal
Brad Loeb
2012
ER
Mr. Pasbalas
1994
The Practice
D.A. Brenner
1997
Malcolm in the Middle
Terry
2000
Crossing Jordan
Frank Ripton
2001
Will & Grace
Mean Guy
1998
Cold Case
Harvey James
2003
Strong Medicine
Asher
2000
Supergirl
Dirk Armstrong
2015
Boston Legal
Reid Harrington
2004
The Drew Carey Show
Mr. Firestein
1995The Drew Carey Show
Arbitrator
1995
black-ish
Leslie Stevens
2014
Judging Amy
Howlett
1999
My Name Is Earl
Daniel
2005
The Bernie Mac Show
2001
Grace and Frankie
Peter Warren
2015
The Equalizer
Man
1985
Profiler
Mr. Wells
1996
Big Love
Bishop
2006
The Secret Life of the American Teenager
Financial Aid Advisor
2008
Hart of Dixie
Reverend Peter Mayfair
2011
Caroline in the City
Lionel
1995
Raising Hope
Mr. Gunderson
2010
Franklin & Bash
Marcel Ziff
2011
Masters of Sex
Leslie Farber
2013
DAHMER - Monster: The Jeffrey Dahmer Story
Mr. Bertoglio
2022
Close to Home
Daryl Denham
2005
One on One
Blaine Lockraven
2001
Ally McBeal
Kendall Stevens
1997
The Parkers
1999
House of Lies
Brant Butterfield
2012
Harry's Law
Neville Johnson
2011
Dharma & Greg
Matthew
1997
Still Standing
Mr. Kruger
2002
Don't Trust the B---- in Apartment 23
Donald Colburn
2012
Law & Order: LA
Attorney Simms
2010
Eli Stone
Dr. Stephen Goodman
2008
Nine Perfect Strangers
Marty (voice)
2021
Them
Mr. Stoat
2021
Your Honor
Calvin Bloom
2020
Herman's Head
1991
Crossbow
1987
Twins
Don
2005
George Lopez
Dr. Loftusi
2002
Project X
Dad
2012
Off Centre
2001
Growing Up Fisher
2014
JONAS L.A.
Mr. Phelps
2009
Justice
2006
Aquarius
Sean Boyle
2015
Better With You
Neil
2010
Friends with Better Lives
Jim
2014
One Hour Photo
Hotel Desk Manager
2002
It's Complicated
Dr. Allen
2009
42
Happy Chandler
2013
Good Morning, Vietnam
Sergeant #2 at Jimmy Wah's
1987
Big Day
2006
Rules Don't Apply
Gene Handsaker
2016The Faculty
Clark Edwards
1996
Firehouse
Dickson Willoughby
1987
Nick of Time
JBN Reporter
1995
Earth to Echo
James Hastings
2014
Theodore Rex
Alex Summers
1995
Trumbo
Robert Kenny
2015
Fool's Paradise
Psych Doc 1
2023
Off Limits
MP
1988
Lorenzo's Oil
Immunosuppression Doctor
1992
Speechless
Andy
1994
Atlas Shrugged: Part III
Head of State Thompson
2014
Inherit the Wind
Jesse Dunlap
1999
Chill Factor
Technician
1999
Tom and Huck
Mr. Sneed
1995
Major League: Back to the Minors
Doc Windgate
1998
Room 6
Dr. Kent
2006
Torch Song Trilogy
1st Young Man
1988
The In Crowd
Bob Mead
2000
Spaceman
Tim Manning
2016So Close
Dr. Salinger
2018
Degree of Certainty
Mr. Leemann
2026
Good Time Max
Anesthesiologist
2008A One Time Thing
Larry
2004
A Simple Wedding
Bill Talbot
2018
Merkin Penal
Emmett O'Donald
2014
Black Girl Missing
Principal Shepherd
2023Embraced by the Light
Screenplay
The Chicago 8
David Dellinger
2011
American Tragedy
Bill Blasier
2000
Love Meet Hope
Todd
2016
Mission Manila
Director
1990Mission Manila
Writer
1990