Michael Cassidy
Biography
Michael Cassidy (born March 20, 1983) is an American film and television actor. He is best known for his role as Zach Stevens on The O.C. and as Tyler Mitchell on the TBS comedy Men at Work. He portrayed Jonathan Walsh on comedy People of Earth from the show's start in 2016 until its 2018 cancellation.
Michael Cassidy on The OC, Marriage, and Famous Encounters
VideoKnown For
TV
Law & Order: Special Victims Unit
Derek Simpson
1999
TV
The Rookie
Caleb Wright
2018
TV
Castle
Greg McClintock
2009
TV
Smallville
Grant Gabriel
2001
TV
MacGyver
Robert Julian
1985
TV
Scandal
Travis Harding
2012
TV
Station 19
Peter
2018
TV
The O.C.
Zach Stevens
2003
TV
Resident Alien
Dr. Ethan Stone
2021
TV
Masters of Sex
Dr. Malcolm Toll
2013
TV
The Magicians
James
2015
TV
Happy Endings
Male Lead
2011
TV
Good Trouble
Asher Bowen
2019
TV
Mythic Quest
Peter Cromwell
2020
Film
Batman v Superman: Dawn of Justice
Jimmy Olsen
2016
Film
Gail Daughtry and the Celebrity Sex Pass
Tom Soursap McNoodleman
2026
TV
Found
Christian Evans
2023
TV
Ballard
Aaron
2025
TV
Stalker
Brian Mitchell
2014
Film
Army of the Dead
Sgt. Kelly
2021
Filmography
2026FilmGail Daughtry and the Celebrity Sex Passas Tom Soursap McNoodleman2025TVBallardas Aaron2023TVFoundas Christian Evans2023TVFatal Attractionas Clay Bishop2023TVWaco: The Aftermathas Bill Johnston2022FilmHypochondriacas NP Chaz2021FilmArmy of the Deadas Sgt. Kelly2021TVResident Alienas Dr. Ethan Stone2020FilmDeliveredas Tom2020FilmBreaking Fastas Kal2020TVMythic Questas Peter Cromwell2019TVGood Troubleas Asher Bowen2018FilmJingle Around the Clockas Max2018TVThe Rookieas Caleb Wright2018FilmDog Daysas Dr. Mike Stone2018FilmThe Dare Projectas Johnny2018TVStation 19as Peter2017FilmThe Strayas Mitch Davis2017TVThe Guest Book2016TVPeople of Earthas Jonathan Walsh2016FilmBatman v Superman: Dawn of Justiceas Jimmy Olsen2015TVThe Magiciansas James2015FilmNight of the Living Debas Ryan Waverly2014TVStalkeras Brian Mitchell2013TVMasters of Sexas Dr. Malcolm Toll2012FilmThe Guilt Tripas Fake Andy (uncredited)2012FilmArgoas Jordan's Analyst2012TVMen at Workas Tyler2012TVScandalas Travis Harding2012TVAre You There, Chelsea?as Jonathan2011TVHappy Endingsas Male Lead2010TVInside Room 334as Seth2009FilmBoys On Film 3: American Boyas Johnny (segment "Dare")2009TVCastleas Greg McClintock2008TVPrivilegedas Charlie Hogan2007TVHidden Palmsas Cliff Wiatt2006FilmZoomas Dylan West / Houdini2006FilmBoys Life 52005FilmDareas Johnny2005FilmThe Girl from Mondayas Ted2003TVThe O.C.as Zach Stevens2001TVSmallvilleas Grant Gabriel1999TVLaw & Order: Special Victims Unitas Derek Simpson1985TVMacGyveras Robert Julian