Patrick Thomas O'Brien
Actor
Born Jan 26, 1951 · Wisconsin, USA
Active 1979–present
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.
Filmography
Unholy Communion (2025) — Father DoyleAlbatross (2026) — LeeCatch Me If You Can (2002) — Mr. HendricksThe Curious Case of Benjamin Button (2008) — Dr. RoseMalcolm in the Middle (2000) — Dad DriverDrake & Josh (2004) — MinisterIt's Always Sunny in Philadelphia (2005) — AssociateThe Wonder Years (1988) — Mr. SantaMonk (2002) — Brent DonovanGilmore Girls (2000) — Brian's DadSabrina, the Teenage Witch (1996) — Cupid · Index ManCSI: Crime Scene Investigation (2000) — Edward CormierMarried... with Children (1987) — Bob Thompson · WallyPleasantville (1998) — RoyER (1994) — CarmichaelThe West Wing (1999) — HansonBabylon 5 (1994) — Cart OwnerSaved by the Bell (1989) — Mr. DeweyStuart Little (1999) — Uncle StretchKiss the Girls (1997) — ReporterHome Improvement (1991) — Ink IngramCarnivàle (2003) — ClarkStep by Step (1991) — ReverendRoswell (1999) — Minister