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Patrick Thomas O'Brien is an American actor. He is perhaps best known for playing the role of Mr. Dewey, the math teacher from Saved by the Bell.
Actor Filmography
| Title | Character | Year |
|---|
| Rescuing Christmas | Chuck | 2023 |
| Angry Neighbors | Jeff Jefferson | 2022 |
| The Last Son | Bartender | 2021 |
| Sold Out | Wayne | 2021 |
| Saved by the Bell | Mr. Dewey | 2020 |
| Project Eden | Stephen Erickson | 2017 |
| Love Always, Santa | Ferris Wheel Operator | 2016 |
| The Public Domain | Bert Pohle | 2015 |
| Theater People | Peter | 2013 |
| Nobody | Dr. Weinstein | 2009 |
Actor Filmography
| Title | Character | Year |
|---|
| Rescuing Christmas | Chuck | 2023 |
| Angry Neighbors | Jeff Jefferson | 2022 |
| The Last Son | Bartender | 2021 |
| Sold Out | Wayne | 2021 |
| Saved by the Bell | Mr. Dewey | 2020 |
| Project Eden | Stephen Erickson | 2017 |
| Love Always, Santa | Ferris Wheel Operator | 2016 |
| The Public Domain | Bert Pohle | 2015 |
| Theater People | Peter | 2013 |
| Nobody | Dr. Weinstein | 2009 |
| The Curious Case of Benjamin Button | Dr. Rose | 2008 |
| Uncross the Stars | Priest | 2008 |
| It's Always Sunny in Philadelphia | Associate | 2005 |
| Dr. Vegas | Burns | 2004 |
| Phil of the Future | Mr. Fleet | 2004 |
| Win a Date with Tad Hamilton! | Father Newell | 2004 |
| Drake & Josh | Minister | 2004 |
| Intolerable Cruelty | Bailiff | 2003 |
| Carnivàle | Clark | 2003 |
| Dickie Roberts: Former Child Star | Mr. Gertrude | 2003 |
| Inhabited | Mr. Kelly | 2003 |
| Dragnet | Janitor | 2003 |
| Catch Me If You Can | Mr. Hendricks | 2002 |
| 'Catch Me If You Can': The Casting of the Film | Mr. Hendricks | 2002 |
| MDs | Mr. Lumly | 2002 |
| Push, Nevada | (as Patrick Thomas O'Brein) | 2002 |
| Monk | Brent Donovan | 2002 |
| Reba | Mr. Devaney | 2001 |
| Dead Last | Jack | 2001 |
| The Brainiacs.com | Mr. Greenmail | 2000 |
| CSI: Crime Scene Investigation | Edward Cormier | 2000 |
| Gilmore Girls | Brian's Dad | 2000 |
| Son of the Beach | Chip's Poopie | 2000 |
| Malcolm in the Middle | Dad Driver | 2000 |
| Stuart Little | Uncle Stretch | 1999 |
| Roswell | Minister | 1999 |
| The West Wing | Hanson | 1999 |
| Me and Will | Hick two | 1999 |
| Providence | (as Patrick O'Brien) | 1999 |
| Felicity | Dan Waldron | 1998 |
| Pleasantville | Roy | 1998 |
| Dead Man on Campus | Priest | 1998 |
| For Your Love | Mr. Spencer | 1998 |
| Working | Carl | 1997 |
| Kiss the Girls | Reporter | 1997 |
| Union Square | Kenny | 1997 |
| Dharma & Greg | Roger | 1997 |
| Pensacola: Wings of Gold | (as Patrick O'Brien) | 1997 |
| Eight Days a Week | Erica's Father | 1997 |
| Sabrina the Teenage Witch | Cupid / Index Man | 1996 |
| 7th Heaven | Professor Valentine | 1996 |
| Night Stand | Neil | 1996 |
| Boston Common | Ron | 1996 |
| JAG | Alfred | 1995 |
| Caroline in the City | Councilman Hardy | 1995 |
| Maybe This Time | James Howell | 1995 |
| The Naked Truth | Lab Man | 1995 |
| Girl in the Cadillac | Ticket man | 1995 |
| Forget Paris | Angry Fan | 1995 |
| Sliders | Jake | 1995 |
| The Brady Bunch Movie | Auctioneer | 1995 |
| The Wayans Bros. | Mr. Webster | 1995 |
| Cybill | Tweedy Man | 1995 |
| ER | Carmichael | 1994 |
| The Boys Are Back | Teacher | 1994 |
| Wagons East | Stranger | 1994 |
| Hart to Hart: Home Is Where the Hart Is | Desk Clerk | 1994 |
| Airborne | Uncle Louis | 1993 |
| Lois & Clark: The New Adventures of Superman | Barker | 1993 |
| Saved by the Bell: The New Class | Mr. Dewey | 1993 |
| The John Larroquette Show | Mr. Hunter | 1993 |
| Getting By | Butler | 1993 |
| Babylon 5 | Cart Owner | 1993 |
| Picket Fences | John Vermette / Kurt | 1992 |
| The Larry Sanders Show | Carl Henckel | 1992 |
| Silk Stalkings | Mr. Petrie | 1991 |
| Marilyn and Me | Casting Director | 1991 |
| Step by Step | Reverend | 1991 |
| Home Improvement | Eugene 'Ink' Ingram | 1991 |
| Driven to Kill | Mobsters | 1991 |
| The Great Los Angeles Earthquake | Jim Allen | 1990 |
| Camp Cucamonga | Virgil | 1990 |
| Babes | Rusty | 1990 |
| Parker Lewis Can't Lose | Mr. Kubiac | 1990 |
| Equal Justice | Thornell Katz | 1990 |
| Dragnet | Wally Tilson | 1989 |
| Family Matters | Mr. Denton | 1989 |
| Life Goes On | Father McMichaels | 1989 |
| Saved by the Bell | Mr. Dewey | 1989 |
| UHF | Satan | 1989 |
| Baywatch | Tom | 1989 |
| Have Faith | Mr. Mahaffey | 1989 |
| The Wonder Years | Mr. Santa | 1988 |
| Jake and the Fatman | Ritchie | 1987 |
| Hooperman | Man in Tie | 1987 |
| Married... with Children | Bob Thompson / Wally | 1987 |
| Easy Street | Don Martin | 1986 |
| 1st & Ten | Anthony Smalss | 1984 |
| Night Court | Man No. 2 / Ernie Carter | 1984 |
| Kenny Rogers as The Gambler: The Adventure Continues | Jenkins | 1983 |
| Jennifer Slept Here | Minister | 1983 |
| The Personals | Jay | 1982 |
| The Facts of Life | Mr. Copeland | 1979 |
