Mark Costello
Acting
36
Acting Credits
Biography
Mark began working professionally in Los Angeles back in 1983, when he booked his first job as the "Starter" in, Hot Dog...the Movie". He continued working numerous Co-Star and Guest spots on episodic TV such as, "Murder She Wrote, "Dynasty," Knots Landing," "Who's the Boss," "LA Law," "Full House", "Seventh Heaven," "ER," "N.Y.P.D. Blue," "The West Wing," and "Criminal Minds." Mark also had recurring roles on such television shows as, "Bay City Blues," "JAG", and "First Monday." In 1990, Mark h...
Known For
Filmography
Paradise
2025
as Billionaire #1
It's Florida, Man.
2024
as Joe Jones
Charles Sloan
2023
as Charles Sloan
Adult Swim Yule Log
2022
as Sheriff
Yes, God, Yes
2020
as Priest
Our Friend
2019
as Richard
Doobious Sources
2017
as Blake Morgan
Dead Silent
2016
as Will Hilton
Femme Fatales
2011
as Detective Mitchum
Turbulent Skies
2010
as Gardner
Solar Flare
2008
as Dispatcher Howard
An Accidental Christmas
2007
as Mr Carroll
Locusts
2005
as Director Rusk
Everybody Hates Chris
2005
as Mr. Richards
The West Wing
1999
as Guest
Kraa! The Sea Monster
1998
as Nuclear Power Plant Supervisor (Uncredited)
Zarkorr! The Invader
1996
as George Ray
7th Heaven
1996
as Ken
Profiler
1996
as Trooper Jasper
JAG
1995
as Otis Flannik
JAG
1995
as Wallace
JAG
1995
as Commander Onclay
ER
1994
as Kevin Halloran
Reasonable Doubts
1991
as Hanratty
Faith
1990
as Policeman
Tribes
1990
as Carl
U.S. Marshals: Waco & Rhinehart
1987
as FBI Agent #1
Full House
1987
as Anchorman
MacGyver
1985
as Cop
Hollywood Hot Tubs
1984
as Mr. Slate
Hot Dog... The Movie
1984
as Event Starter
Crazy like a Fox
1984
as Nolan
Murder, She Wrote
1984
as Guard
Murder, She Wrote
1984
as Sgt. O'Connor
Murder, She Wrote
1984
as Officer
Knots Landing
1979