Patrick Thomas O'Brien

Patrick Thomas O'Brien (born January 26, 1951) is an American actor. He is perhaps best known for playing the role of Mr. Dewey, the math teacher from Saved by the Bell.
== Life and career ==
O'Brien was born in Wisconsin and graduated from Regis High School in Eau Claire. He then attended the University of Wisconsin-Eau Claire receiving his B.A. in 1975. O'Brien has appeared in several films including Stuart Little, The Curious Case of Benjamin Button, Catch Me If You Can and Kiss the Girls. Despite several movie appearances, the majority of O'Brien's career has centered on television. To name just a few T.V. shows, he has appeared on Monk, It's Always Sunny in Philadelphia, Sabrina the Teenage Witch, The Gilmore Girls, The West Wing, Baywatch, Boston Common and Home Improvement.
== Filmography ==
2018 Fairy Tail (Short) (post-production) 
Priest
2018/I Adulthood (Short) 
Jimmy Slater (future)
2017 Project Eden: Vol. I 
Stephen Erickson
2016 Love Always, Santa (TV Movie) 
Ferris Wheel Operator (as Patrick O'Brien)
2015 Theater People (TV Series) 
Peter
- The Fat Guy Sings (2015) ... Peter
- The Actor's Nightmare (2015) ... Peter
- The Lost Episode (2015) ... Peter
- A Different Kind of Jackass (2015) ... Peter
- Make 'Em Laugh (2015) ... Peter
Show all 8 episodes
2015 The Public Domain 
Bert Pohle
2014 Huske (Short) 
Lars
2009 Nobody 
Dr. Weinstein
2008 The Curious Case of Benjamin Button 
Dr. Rose
2008 Uncross the Stars 
Priest (as Patrick O'Brien)
2008 The Last Days of Limbo (Short) 
Father Bruce
2006 Drake & Josh (TV Series) 
Minister
- The Great Doheny (2006) ... Minister
2006 It's Always Sunny in Philadelphia (TV Series) 
Associate
- The Gang Runs for Office (2006) ... Associate
2004 Dr. Vegas (TV Series) 
Burns
- Dead Man, Live Bet (2004) ... Burns
2004 Monk (TV Series) 
Brent Donovan
- Mr. Monk and the Employee of the Month (2004) ... Brent Donovan
2004 Gilmore Girls (TV Series) 
Brian's Dad
- Afterboom (2004) ... Brian's Dad
2004 JAG (TV Series) 
Alfred
- People vs. SecNav (2004) ... Alfred
2004 Win a Date with Tad Hamilton! 
Father Newell (as Patrick O'Brien)
2003 Malcolm in the Middle (TV Series) 
Dad Driver
- Christmas Trees (2003) ... Dad Driver
2003 Carnivàle (TV Series) 
Clark
- After the Ball Is Over (2003) ... Clark (as Patrick T. O'Brien)
2003 Dickie Roberts: Former Child Star 
Mr. Gertrude
2003 Intolerable Cruelty 
Bailiff
2003 Inhabited (Video) 
Mr. Kelly (as Patrick O'Brien)
2003 Dragnet (TV Series) 
Janitor
- The Big Ruckus (2003) ... Janitor
2003 ER (TV Series) 
Carmichael
- No Good Deed Goes Unpunished (2003) ... Carmichael
2002 Co-Incidence 
Towny
2002 Catch Me If You Can 
Mr. Hendricks (as Patrick T. O'Brien)
2002 MDs (TV Series) 
Mr. Lumly
- Cruel and Unusual (2002) ... Mr. Lumly
2002 Son of the Beach (TV Series) 
Chip's Poopie
- Bad News, Mr. Johnson (2002) ... Chip's Poopie
2002 Felicity (TV Series) 
Dan Waldron
- The Paper Chase (2002) ... Dan Waldron (as Patrick O'Brien)
2002 CSI: Crime Scene Investigation (TV Series) 
Edward Cormier
- Burden of Proof (2002) ... Edward Cormier
2001 Reba (TV Series) 
Mr. Devaney
- Don't Know Much About History (2001) ... Mr. Devaney (as Patrick T. O'Brien)
2001 Roswell (TV Series) 
Minister
- To Have and to Hold (2001) ... Minister (as Patrick T. O'Brien)
2001 Providence (TV Series) 
- Impulse Control (2001) ... (as Patrick O'Brien)
2001 Dead Last (TV Series) 
Jack
- Gastric Distress (2001) ... Jack
2001 State of Grace (TV Series) 
- Crime and Self-Punishment (2001)
2001 The West Wing (TV Series) 
Hanson
- Two Cathedrals (2001) ... Hanson
2000 The Brainiacs.com 
Mr. Greenmail (as Patrick T. O'Brien)
1999 Stuart Little 
Uncle Stretch (as Patrick O'Brien)
1999 Dharma & Greg (TV Series) 
Roger
- Law & Disorder (1999) ... Roger (as Patrick T. O'Brien)
1999 Me and Will 
Hick two
1999 7th Heaven (TV Series) 
Professor Valentine
- With Honors (1999) ... Professor Valentine (as Patrick T. O'Brien)
1999 Sliders (TV Series) 
Jake
- Data World (1999) ... Jake (as Patrick T. O'Brien)
1998 Pensacola: Wings of Gold (TV Series) 
- Boom (1998) ... (as Patrick O'Brien)
1998 A Perfect Pitch (Short) 
James (as Patrick O'Brien)
1998 Pleasantville 
Roy (as Patrick T. O'Brien)
1998 Silk Stalkings (TV Series) 
Mr. Petrie
- Hidden Agenda (1998) ... Mr. Petrie (as Patrick T. O'Brien)
1998 Dead Man on Campus 
Priest (as Patrick T. O'Brien)
1997-1998 Sabrina, the Teenage Witch (TV Series) 
Cupid / Index Man
- The Equalizer (1998) ... Cupid (as Patrick T. O'Brien)
- Dummy for Love (1997) ... Cupid (as Patrick T. O'Brien)
- Meeting Dad's Girlfriend (1997) ... Index Man (as Patrick T. O'Brien)
1998 The Wayans Bros. (TV Series) 
Mr. Webster
- All in the Family Feud (1998) ... Mr. Webster (as Patrick O'Brien)
1997 976-WISH (Short) 
Spade
1997 Working (TV Series) 
Carl
- Top O' the World Ma (1997) ... Carl
1997 Union Square (TV Series) 
Kenny
- Jack Gets a Hot Tip (1997) ... Kenny
1997 Family Matters (TV Series) 
Mr. Denton
- A Pain in Harrassment (1997) ... Mr. Denton
1997 Kiss the Girls 
Reporter (as Patrick T. O'Brien)
1997 Step by Step (TV Series) 
Reverend
- Future Shock (1997) ... Reverend (as Patrick T. O'Brien)
1997 The Naked Truth (TV Series) 
Lab Man
- The Birds (1997) ... Lab Man
1997 Boston Common (TV Series) 
Ron
- A Night in Camelot (1997) ... Ron (as Patrick T. O'Brien)
1997/I Eight Days a Week 
Erica's Father (as Patrick O'Brien)
1995-1996 Night Stand (TV Series) 
Neil
- Clip Show (1996) ... Neil
- Crime Show (1995) ... Neil (as Patrick T. O'Brien)
1988-1996 Married with Children (TV Series) 
Bob Thompson / Wally
- Children of the Corns (1996) ... Bob Thompson (as Patrick T. O'Brien)
- Build a Better Mousetrap (1988) ... Wally (as Patrick T. O'Brien)
1996 The John Larroquette Show (TV Series) 
Mr. Hunter
- Bathing with Ernest Hemingway (1996) ... Mr. Hunter
1996 Saved by the Bell: The New Class (TV Series) 
Mr. Dewey
- Little Hero (1996) ... Mr. Dewey (as Patrick T. O'Brien)
1996 Cybill (TV Series) 
Tweedy Man
- Lowenstein's Lament (1996) ... Tweedy Man (as Patrick T. O'Brien)
1992-1996 Picket Fences (TV Series) 
Kurt / John Vermette
- My Romance (1996) ... Kurt
- Sacred Hearts (1992) ... John Vermette
1996 Caroline in the City (TV Series) 
Councilman Hardy
- Caroline and the Twenty-Eight-Pound Walleye (1996) ... Councilman Hardy (as Patrick T. O'Brien)
1995 Maybe This Time (TV Series) 
James Howell
- Judgement Day (1995) ... James Howell (as Patrick T. O'Brien)
1995 Girl in the Cadillac 
Ticket man
1995 Forget Paris 
Angry Fan
1995 The Brady Bunch Movie 
Auctioneer
1994 The Boys Are Back (TV Series) 
Teacher
- The Good, the Bad and the Hansens (1994) ... Teacher
1994 Baywatch (TV Series) 
Tom
- Livin' on the Fault Line: Part 2 (1994) ... Tom (as Patrick O'Brien)
- Livin' on the Fault Line: Part 1 (1994) ... Tom (as Patrick O'Brien)
1994 Wagons East 
Stranger
1994 Babylon 5 (TV Series) 
Cart Owner
- Legacies (1994) ... Cart Owner (as Patrick O'Brien)
1994 Hart to Hart: Home Is Where the Hart Is (TV Movie) 
Desk Clerk
1994 Getting By (TV Series) 
Butler
- The Rich Guy (1994) ... Butler
1993 Lois & Clark: The New Adventures of Superman (TV Series) 
Barker
- The Green, Green Glow of Home (1993) ... Barker
1993 Airborne 
Uncle Louis (as Patrick O'Brien)
1989-1992 Saved by the Bell (TV Series) 
Mr. Dewey
- Screech's Birthday (1992) ... Mr. Dewey (as Patrick T. O'Brien)
- Jessie's Song (1990) ... Mr. Dewey (as Patrick T. O'Brien)
- King of the Hill (1989) ... Mr. Dewey (as Patrick O'Brien)
- The Election (1989) ... Mr. Dewey (as Patrick T. O'Brien)
1992 The Larry Sanders Show (TV Series) 
Carl Henckel
- Hey Now (1992) ... Carl Henckel (as Patrick T. O'Brien)
1992 Home Improvement (TV Series) 
Eugene 'Ink' Ingram
- Jill's Birthday (1992) ... Eugene 'Ink' Ingram (as Patrick T. O'Brien)
1991 Driven to Kill 
Mobsters
1991 The Wonder Years (TV Series) 
Mr. Santa
- Christmas Party (1991) ... Mr. Santa (as Patrick O'Brien)
1991 Marilyn and Me (TV Movie) 
Casting Director (as Patrick O'Brien)
1991 Switched at Birth (TV Movie) 
Dr. Purchio
1991 Equal Justice (TV Series) 
Thornell Katz
- Without Prejudice (1991) ... Thornell Katz
1990 The Great Los Angeles Earthquake (TV Movie) 
Jim Allen
1990 Dragnet (TV Series) 
Wally Tilson
- Living Victim (1990) ... Wally Tilson
1990 Camp Cucamonga (TV Movie) 
Virgil
1990 Life Goes On (TV Series) 
Father McMichaels
- Honeymoon from Hell (1990) ... Father McMichaels
1990 Parker Lewis Can't Lose (TV Series) 
Mr. Kubiac
- Operation Kubiak (1990) ... Mr. Kubiac (as Patrick T. O'Brien)
1990 1st & Ten: The Championship (TV Series) 
Anthony Smalss
- Earn This One for Ernie (1990) ... Anthony Smalss
1989 UHF 
Satan (as Patrick O'Brian)
1989 Have Faith (TV Series) 
Mr. Mahaffey
- Bingo (1989) ... Mr. Mahaffey
1988 The Facts of Life (TV Series) 
Mr. Copeland
- The Beginning of the End (1988) ... Mr. Copeland (as Patrick T. O'Brien)
1987-1988 Night Court (TV Series) 
Ernie Carter / Man No. 2
- Dan, the Walking Time Bomb (1988) ... Ernie Carter (as Patrick T. O'Brien)
- Christine's Friend (1987) ... Man No. 2 (as Patrick O'Brien)
1987 Hooperman (TV Series) 
- Deck the Cell with Bars of Folly (1987) ... (as Patrick T. O'Brien)
1987 Jake and the Fatman (TV Series) 
Ritchie
- Body and Soul (1987) ... Ritchie (as Patrick T. O'Brien)
1986 Easy Street (TV Series) 
Don Martin
- Demon Child '86 (1986) ... Don Martin
1983 Jennifer Slept Here (TV Series) 
- Trading Faces (1983)
1983 Kenny Rogers as The Gambler: The Adventure Continues (TV Movie) 
Jenkins
1982 The Personals 
Jay (as Patrick O'Brien)