Mark Costello
Acting
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 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.
Filmography
34 credits
Charles Sloan
Movie • 2023
Charles Sloan

Turbulent Skies
Movie • 2010
Gardner

Locusts
Movie • 2005
Director Rusk

Our Friend
Movie • 2019
Richard

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

Hollywood Hot Tubs
Movie • 1984
Mr. Slate

Hot Dog... The Movie
Movie • 1984
Event Starter

Adult Swim Yule Log
Movie • 2022
Sheriff

Doobious Sources
Movie • 2017
Blake Morgan

Yes, God, Yes
Movie • 2020
Priest

Solar Flare
Movie • 2008
Dispatcher Howard

An Accidental Christmas
Movie • 2007

Zarkorr! The Invader
Movie • 1996
George Ray

Faith
Movie • 1990
Policeman

JAG
TV • 1995
Otis Flannik

Crazy like a Fox
TV • 1984
Nolan

Full House
TV • 1987
Anchorman

Tribes
TV • 1990
Carl

Dead Silent
TV • 2016
Will Hilton

Reasonable Doubts
TV • 1991
Hanratty

Femme Fatales
TV • 2011
Detective Mitchum

MacGyver
TV • 1985
Cop

JAG
TV • 1995
Wallace

JAG
TV • 1995
Commander Onclay

7th Heaven
TV • 1996
Ken

The West Wing
TV • 1999
Guest

ER
TV • 1994
Kevin Halloran

Murder, She Wrote
TV • 1984
Guard

Murder, She Wrote
TV • 1984
Sgt. O'Connor

Knots Landing
TV • 1979

Murder, She Wrote
TV • 1984
Officer

Paradise
TV • 2025
Billionaire #1

Everybody Hates Chris
TV • 2005
Mr. Richards

Profiler
TV • 1996
Trooper Jasper