Mark Costello
Born
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Known For
Acting
Place of Birth
St. Louis, Missouri, United States
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 had a three year contract on the FOX youth oriented drama, "Tribes". Mark was very established in the theatre world in Los Angeles, having won Best Actor in a Feature Role from Stage Scene LA, for his performances in,"Finding Fossils" and "John is a Father" at The Road Theatre, as well as "Mom's Dead", at Sacred Fools. Mark appeared with Susan Sullivan and David Selby in Edward Albee's, "A Delicate Balance," at the Odyssey Theatre , which won the LA Drama Critics Circle McCulloh Award for Best Revival. Mark moved to Atlanta in 2017 and has appeared in the films, "Yes, God, Yes," "Our Friend" and the independent feature film, "Charles Sloan", which he played the title role, and which won For Best Full Length Feature Film at the 2022 Raleigh Film and Arts Festival.

Paradise
Billionaire #1 · (1 episode)
2025

Charles Sloan
Charles Sloan
2023

Adult Swim Yule Log
Sheriff
2022

Yes, God, Yes
Priest
2020

Our Friend
Richard
2019

Doobious Sources
Blake Morgan
2017

Dead Silent
Will Hilton · (1 episode)
2016

Femme Fatales
Detective Mitchum · (1 episode)
2011

Turbulent Skies
Gardner
2010

Solar Flare
Dispatcher Howard
2008

An Accidental Christmas
2007

Locusts
Director Rusk
2005

The West Wing
Guest · (1 episode)
1999

7th Heaven
Ken · (1 episode)
1996

Zarkorr! The Invader
George Ray
1996

JAG
Otis Flannik · (1 episode)
1995

JAG
Wallace · (1 episode)
1995

JAG
Commander Onclay · (1 episode)
1995

ER
Kevin Halloran · (1 episode)
1994

Reasonable Doubts
Hanratty · (2 episodes)
1991

Faith
Policeman
1990
Tribes
Carl · (52 episodes)
1990

Full House
Anchorman · (1 episode)
1987

U.S. Marshals: Waco & Rhinehart
FBI Agent #1
1987

MacGyver
Cop · (1 episode)
1985

Crazy like a Fox
Nolan · (1 episode)
1984

Murder, She Wrote
Guard · (1 episode)
1984

Murder, She Wrote
Sgt. O'Connor · (1 episode)
1984

Murder, She Wrote
Officer · (1 episode)
1984

Hollywood Hot Tubs
Mr. Slate
1984

Hot Dog... The Movie
Event Starter
1984

Knots Landing
(1 episode)
1979