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)