Cast & creator
Patrick Thomas O'Brien
Best known for CSI: Crime Scene Investigation, The West Wing, Gilmore Girls
Also known as: Patrick T. O'Brien, Patrick O'Brien, P. O'Brien
29
film credits
43
television credits
72
1979–2026 · acting roles
6.8
average across scored titles
Signature credits
Known for
Across film & television
Filmography (72)
Showing 72 of 72 credits
CSI: Crime Scene Investigation
Edward Cormier
2000
The West Wing
Hanson
1999
Gilmore Girls
Brian's Dad
2000
Monk
Brent Donovan
2002
Married... with Children
Wally
1987Married... with Children
Bob Thompson
1987
It's Always Sunny in Philadelphia
Associate
2005
ER
Carmichael
1994
Malcolm in the Middle
Dad Driver
2000
Babylon 5
Cart Owner
1994
Sabrina, the Teenage Witch
Index Man
1996Sabrina, the Teenage Witch
Cupid
1996
Home Improvement
Ink Ingram
1991
Night Court
Ernie Carter
1984
Baywatch
1989
The Wonder Years
Mr. Santa
1988
Lois & Clark: The New Adventures of Superman
Barker
1993
Family Matters
Mr. Denton
1989
The Facts of Life
1979
Sliders
Jake
1995
Jake and the Fatman
1987
Step by Step
Reverend
1991
The Larry Sanders Show
Carl Henckel
1992
Caroline in the City
Councilman Hardy
1995
7th Heaven
Professor Valentine
1996
Roswell
Minister
1999
Drake & Josh
Minister
2004
Felicity
Dan Waldron
1998
Reba
Mr. Devaney
2001
The John Larroquette Show
Mr. Hunter
1993
Cybill
Tweedy Man
1995
Saved by the Bell: The New Class
Mr. Dewey
1993
Catch Me If You Can
Mr. Hendricks
2002
The Naked Truth
Lab Man
1995
Dharma & Greg
Roger
1997
Saved by the Bell
Mr. Dewey
1989
Carnivàle
Clark
2003
Parker Lewis Can't Lose
Mr. Kubiac
1990
The Curious Case of Benjamin Button
Dr. Rose
2008
Son of the Beach
2000
Working
Carl
1997
Saved by the Bell
Mr. Dewey
2020
Kiss the Girls
Reporter
1997
Boston Common
Ron
1996
State of Grace
Bill
2001
Stuart Little
Uncle Stretch
1999
Union Square
Kenny
1997
Intolerable Cruelty
Bailiff
2003
Pleasantville
Roy
1998
The Brady Bunch Movie
Auctioneer
1995
Dickie Roberts: Former Child Star
Mr. Gertrude
2003
Win a Date with Tad Hamilton!
Father Newell
2004
Dead Man on Campus
Priest
1998
Wagons East!
Stranger
1994
UHF
Satan
1989
Airborne
Uncle Louis
1993
Forget Paris
Angry Fan
1995
Eight Days a Week
Erica's Father
1997
Camp Cucamonga
Virgil
1990
Albatross
Lee
2026
Uncross the Stars
Priest
2008
Girl in the Cadillac
Ticket man
1995
The Personals
Jay
1982
Hart to Hart: Home Is Where the Hart Is
Desk Clerk
1994The Autopsy of Albert Kemper
Coroner
Sold Out
Wayne
2021
Unholy Communion
Father Doyle
2025
Marilyn and Me
Casting Director
1991
Fairy Tail
Priest
2018
Rescuing Christmas
Chuck
2023
Inhabited
Mr. Kelly
2003
Co-Incidence
Towny
2002