Michael Cassidy
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.
Acting
Movie
Batman v Superman: Dawn of Justice
as Jimmy Olsen
2016
Movie
Argo
as Jordan's Analyst
2012
TV
Smallville
as Grant Gabriel
2001
Movie
Army of the Dead
as Sgt. Kelly
2021
TV
Law & Order: Special Victims Unit
as Derek Simpson
1999
TV
The Rookie
as Caleb Wright
2018
TV
Castle
as Greg McClintock
2009
TV
The Magicians
as James
2015
TV
Station 19
as Peter
2018
TV
Resident Alien
as Dr. Ethan Stone
2021
TV
The O.C.
as Zach Stevens
2003
TV
MacGyver
as Robert Julian
1985
Movie
The Guilt Trip
as Fake Andy (uncredited)
2012
Movie
Zoom
as Dylan West / Houdini
2006
TV
Scandal
as Travis Harding
2012
TV
Mythic Quest
as Peter Cromwell
2020
TV
Masters of Sex
as Dr. Malcolm Toll
2013
Movie
Dog Days
as Dr. Mike Stone
2018
TV
Happy Endings
as Male Lead
2011
TV
Good Trouble
as Asher Bowen
2019
TV
Ballard
as Aaron
2025
Movie
Night of the Living Deb
as Ryan Waverly
2015
TV
Stalker
as Brian Mitchell
2014
TV
People of Earth
as Jonathan Walsh
2016