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Known forActing
Born January 26, 1951
Wisconsin, USA
67 credits
Acting
Patrick Thomas O'Brien
No biography available.
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CSI: Crime Scene Investigation
2000 · ★ 7.6
Monk
2002 · ★ 7.9
ER
1994 · ★ 7.8
Malcolm in the Middle
2000 · ★ 8.5
Gilmore Girls
2000 · ★ 7.9
Married... with Children
1987 · ★ 7.7
The West Wing
1999 · ★ 8.3
It's Always Sunny in Philadelphia
2005 · ★ 8.3
Baywatch
1989 · ★ 6.0
Babylon 5
1994 · ★ 8.0
Home Improvement
1991 · ★ 7.4
Sabrina, the Teenage Witch
1996 · ★ 7.8
The Wonder Years
1988 · ★ 8.3
Lois & Clark: The New Adventures of Superman
1993 · ★ 7.0
Night Court
1984 · ★ 7.3
Family Matters
1989 · ★ 6.8
Felicity
1998 · ★ 6.6
Sliders
1995 · ★ 7.6
Reba
2001 · ★ 6.5
Drake & Josh
2004 · ★ 8.4
Step by Step
1991 · ★ 7.7
Roswell
1999 · ★ 7.7
The Facts of Life
1979 · ★ 7.1
Jake and the Fatman
1987 · ★ 6.2
Catch Me If You Can
2002 · ★ 8.0
7th Heaven
1996 · ★ 6.4
Caroline in the City
1995 · ★ 6.5
Cybill
1995 · ★ 5.9
Dharma & Greg
1997 · ★ 6.4
The John Larroquette Show
1993 · ★ 6.8
Saved by the Bell
1989 · ★ 7.8
The Larry Sanders Show
1992 · ★ 7.6
The Curious Case of Benjamin Button
2008 · ★ 7.6
Stuart Little
1999 · ★ 6.1
Saved by the Bell: The New Class
1993 · ★ 5.9
The Naked Truth
1995 · ★ 6.5
Parker Lewis Can't Lose
1990 · ★ 7.4
Carnivàle
2003 · ★ 7.9
Son of the Beach
2000 · ★ 6.6
Saved by the Bell
2020 · ★ 6.8
Working
1997 · ★ 5.3
Kiss the Girls
1997 · ★ 6.5
Boston Common
1996 · ★ 7.0
Union Square
1997 · ★ 8.5
Pleasantville
1998 · ★ 7.3
State of Grace
2001 · ★ 6.3
Intolerable Cruelty
2003 · ★ 6.0
The Brady Bunch Movie
1995 · ★ 6.1
Win a Date with Tad Hamilton!
2004 · ★ 5.7
UHF
1989 · ★ 6.7
Dead Man on Campus
1998 · ★ 5.5
Dickie Roberts: Former Child Star
2003 · ★ 5.1
Airborne
1993 · ★ 6.1
Wagons East!
1994 · ★ 4.9
Forget Paris
1995 · ★ 6.3
Camp Cucamonga
1990 · ★ 4.8
Marilyn and Me
1991 · ★ 6.6
Inhabited
2003 · ★ 6.5
Eight Days a Week
1997 · ★ 5.4
Uncross the Stars
2008 · ★ 5.4
Rescuing Christmas
2023 · ★ 6.8
The Autopsy of Albert Kemper
— · ★ 0.0
Co-Incidence
2002 · ★ 7.0
The Personals
1982 · ★ 4.0
Unholy Communion
2025 · ★ 0.0
Sold Out
2021 · ★ 4.5
Fairy Tail
2018 · ★ 0.0