Patrick Thomas O'Brien (born 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 The Personals, Airborne, 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, which has included appearances on Monk, It's Always Sunny in Philadelphia, Sabrina the Teenage Witch, Gilmore Girls, The West Wing, Married... with Children, Baywatch, Boston Common, Parker Lewis Can't Lose, Saved by the Bell, and Home Improvement. He moved to Minneapolis in 2004 and has been performing, directing, and producing for various theaters in the Twin Cities.
Filmography
Films YearFilmRoleDirectorCredited asNotes1982The PersonalsJoyce GibsonPeter MarklePatrick O'Brien1989UHFSatanJay LeveyPatrick O'Brien1991Driven to KillMobsterJosh GazarianPatrick O'Brien1993AirborneUncle LouisRob BowmanPatrick O'Brien1994Wagons EastStrangerPeter MarklePatrick Thomas O'Brien1995The Brady Bunch MovieAuctioneerBetty ThomasPatrick Thomas O'BrienForget ParisAngry FanBilly CrystalPatrick Thomas O'BrienGirl in the CadillacTicket ManLucas PlattPatrick Thomas O'Brien1997Eight Days a WeekErica's FatherMichael DavisPatrick O'Brien976-WISHSpadeDavid L. BertmanPatrick Thomas O'BrienShort film Kiss the GirlsReporterGary FlederPatrick T. O'Brien1998Dead Man on CampusPriestAlan CohnPatrick T. O'BrienPleasantvilleRoyGary RossPatrick T. O'Brien A Perfect PitchJamesBruce WorrilowPatrick O'BrienShort film 1999Me and WillHick #2Melissa Behr and Sherrie RosePatrick Thomas O'BrienStuart LittleUncle StretchRob MinkoffPatrick O'Brien2000The Brainiacs.comMr. GreenmailBlair TreuPatrick T. O'BrienDirect-to-video release2002Catch Me If You CanMr. HendricksSteven SpielbergPatrick T. O'BrienCo-incidenceTownyCristian YoungMillerPatrick Thomas O'Brien2003InhabitedMr. KellyKelly SandefurPatrick O'BrienDirect-to-video release Intolerable CrueltyBailiffJoel and Ethan CoenPatrick Thomas O'BrienDickie Roberts: Former Child StarMr. GertrudeSam WeismanPatrick Thomas O'Brien2004Win a Date with Tad Hamilton!Father NewellRobert LuketicPatrick O'Brien2008The Last Days of LimboFather BruceJason WardPatrick Thomas O'BrienShort film Uncross the StarsPriestKenny GoldePatrick O'BrienThe Curious Case of Benjamin ButtonDr. RoseDavid FincherPatrick Thomas O'Brien2009NobodyDr. WeinsteinRob PerezPatrick Thomas O'Brien2014HuskeLarsJoshua RobertsonPatrick Thomas O'BrienShort film2015The Public DomainBert PohlePatrick CoylePatrick Thomas O'Brien2017Project EdenStephen EricksonAshlee Jensen and Terrance M. YoungPatrick Thomas O'Brien2018AdulthoodJimmy Slater (future)Justin and Kristin SchaackPatrick Thomas O'BrienShort film Fairy TailPriestJustin and Kristin SchaackPatrick Thomas O'BrienShort film 2021The Last SonBartenderTim SuttonPatrick Thomas O'BrienSold OutWayneTim DahlseldPatrick Thomas O'Brien2022Angry NeighborsJeff JeffersonWarren BrockPatrick Thomas O'Brien
Television Year(s) Title Role(s)Credited as Notes1983Kenny Rogers as The Gambler: The Adventure ContinuesJenkinsPatrick O'BrienTV movie Jennifer Slept HereMinisterPatrick T. O'BrienS1E7 "Trading Faces" 1986Easy StreetDon MartinPatrick Thomas O'BrienS1E12 "Demon Child '86" 1987Jake and the FatmanRitchiePatrick T. O'BrienS1E7 "Body and Soul" HoopermanMan in TiePatrick T. O'BrienS1E11 "Deck the Cell with Bars of Folly" 1987–1988Night CourtMan No. 2; Ernie CarterPatrick O'Brien; Patrick T. O'BrienS4E17 "Christine's Friend"; S5E12 "Dan, the Walking Time Bomb"1988The Facts of LifeMr. CopelandPatrick T. O'BrienS9E23 "The Beginning of the End"1988–1996Married... with ChildrenWally; Bob ThompsonPatrick T. O'BrienS2E15 "Build a Better Mousetrap"; S11E2 "Children of the Corns"1989Have FaithMr. MahaffeyPatrick Thomas O'BrienS1E4 "Bingo"1989–1992Saved by the Bell (original series)Mr. DeweyPatrick Thomas O'Brien4 episodes19901st & TenAnthony SmalssPatrick Thomas O'BrienS5E13 "Earn This One for Ernie" Parker Lewis Can't LoseMr. KubiacPatrick T. O'BrienS1E2 "Operation Kubiac" Life Goes OnFather McMichaelsPatrick Thomas O'BrienS2E1 "Honeymoon from Hell" Camp CucamongaVirgilPatrick Thomas O'BrienTV movie The New DragnetWally TilsonPatrick T. O'BrienS1E2 "The Living Victim" The Great Los Angeles EarthquakeJim AllenPatrick Thomas O'BrienTV movie 1991BabesRustyPatrick T. O'BrienS1E16 "Babes in Boyland" Equal JusticeThornell KatzPatrick Thomas O'BrienS1E2 "Without Prejudice" Switched at BirthDr. PurchioPatrick T. O'BrienS1E1 Marilyn and MeCasting DirectorPatrick O'BrienTV movie The Wonder YearsMr. SantaPatrick O'BrienS5E9 "Christmas Party" 1992Home ImprovementEugene "Ink" IngramPatrick T. O'BrienS1E16 "Jill's Birthday" The Larry Sanders ShowCarl HenckelPatrick T. O'BrienS1E13 "Hey Now" 1992–1996Picket FencesJohn Vermette; KurtPatrick Thomas O'BrienS1E8 "Sacred Hearts"; S4E13 "My Romance"1993Lois & Clark: The New Adventures of SupermanBarkerPatrick Thomas O'BrienS1E8 "The Green, Green Glow of Home"1994Getting ByButlerPatrick Thomas O'BrienS2E15 "The Rich Guy" Hart to Hart: Home Is Where the Hart IsDesk ClerkPatrick Thomas O'BrienTV movie Babylon 5Cart OwnerPatrick O'BrienS1E17 "Legacies" BaywatchTomPatrick O'BrienS5E1 "Livin' on the Fault Line: Part 1"; S5E2 "Livin' on the Fault Line: Part 2" The Boys Are BackTeacherPatrick Thomas O'BrienS1E6 "The Good, the Bad and the Hansens" 1995Maybe This TimeJames HowellPatrick T. O'BrienS1E11 "Judgment Day"1995–1996Night Stand with Dick DietrickNeilPatrick T. O'BrienS1E3 "Crime Show"; S1E52 "Clip Show"1996Caroline in the CityCouncilman HardyPatrick T. O'BrienS1E13 "Caroline and the Twenty-Eight-Pound Walleye" CybillTweedy ManPatrick T. O'BrienS2E15 "Lowenstein's Lament" Saved by the Bell: The New ClassMr. DeweyPatrick T. O'BrienS4E6 "Little Hero" The John Larroquette ShowMr. HunterPatrick O'BrienS4E3 "Bathing with Ernest Hemingway" 1997Boston CommonRonPatrick T. O'BrienS2E14 "A Night in Camelot" The Naked TruthLab ManPatrick Thomas O'BrienS2E9 "The Birds" Step by StepReverendPatrick T. O'BrienS6E14 "Future Shock" Family MattersMr. DentonPatrick Thomas O'BrienS9E9 "A Pain in Harassment" Union SquareKennyPatrick T. O'BrienS1E8 "Jack Gets a Hot Tip" WorkingCarlPatrick Thomas O'BrienS1E8 "Top O' the World Ma" 1997–1998Sabrina the Teenage WitchIndex Man; CupidPatrick T. O'BrienS1E20 "Meeting Dad's Girlfriend"; S2E3 "Dummy for Love"; S2E17 "The Equalizer"1998The Wayans Bros.Mr. WebsterPatrick O'BrienS4E11 "All in the Family Feud" Silk StalkingsMr. PetriePatrick T. O'BrienS8E6 "Hidden Agenda" Pensacola: Wings of GoldPatrick O'BrienS2E7 "Boom" 1999SlidersJakePatrick T. O'BrienS4E17 "Data World" 7th HeavenProfessor ValentinePatrick T. O'BrienS4E5 "With Honors" Dharma & GregRogerPatrick T. O'BrienS3E9 "Law & Disorder" 2001For Your LoveMr. SpencerPatrick T. O'BrienS4E9 "The Model Client" The West WingHansonPatrick Thomas O'BrienS2E22 "Two Cathedrals" State of GraceBillPatrick T. O'BrienS1E6 "Crime and Self-Punishment" Dead LastJackPatrick Thomas O'BrienS1E7 "Gastric Distress"ProvidenceDr. SmithersPatrick O'BrienS4E3 "Impulse Control" RoswellMinisterPatrick T. O'BrienS3E6 "To Have and to Hold" RebaMr. DevaneyPatrick T. O'BrienS1E8 "Don't Know Much About History" 2002CSI: Crime Scene InvestigationEdward CormierPatrick Thomas O'BrienS2E15 "Burden of Proof" FelicityDan WaldronPatrick O'BrienS4E15 "The Paper Chase" Son of the BeachChip's PoopiePatrick Thomas O'BrienS3E14 "Bad News, Mr. Johnson" MDsMr. LumlyPatrick Thomas O'BrienS1E5 "Cruel and Unusual" Push, NevadaPatrick Thomas O'Brein (sic)S1E6 "S.O.S." 2003ERCarmichaelPatrick Thomas O'BrienS9E13 "No Good Deed Goes Unpunished" L.A. DragnetJanitorPatrick Thomas O'BrienS1E2 "The Big Ruckus" CarnivàleClarkPatrick T. O'BrienS1E2 "After the Ball Is Over" Malcolm in the MiddleDad DriverPatrick Thomas O'BrienS5E7 "Christmas Trees" 2004JAGAlfredPatrick Thomas O'BrienS9E14 "People vs. SecNav" Gilmore GirlsBrian's DadPatrick Thomas O'BrienS4E19 "Afterboom" MonkBrent DonovanPatrick Thomas O'BrienS3E7 "Mr. Monk and the Employee of the Month" Phil of the FutureMr. FleetPatrick O'BrienS1E12 "You Say Toe-Mato" Dr. VegasBurnsPatrick Thomas O'BrienS1E3 "Dead Man, Live Bet" 2006It's Always Sunny in PhiladelphiaAssociatePatrick Thomas O'BrienS2E8 "The Gang Runs for Office" Drake & JoshMinisterPatrick Thomas O'BrienS4E6 "The Great Doheny" 2015Theater PeoplePeterPatrick Thomas O'Brien9 episodes2016Love Always, SantaFerris Wheel OperatorPatrick Thomas O'BrienTV movie2020–2021Saved by the Bell (2020 reboot)Mr. DeweyPatrick Thomas O'Brien4 episodes2021BreakdownsPatrickPatrick Thomas O'BrienTV movie2023Rescuing ChristmasChuckPatrick O'BrienTV movie
References
External links