We don't have a biography for Mark O'Brien yet. Hang in there, or go ahead and contribute one.
Known For
Credits
Cast Credits
61st Street (2022)
Starring as Officer Johnny Logan
(16 episodes)
- Episode 2x08: Judgement Day (Aug 15, 2023)
- Episode 2x07: The Offer (Aug 8, 2023)
- Episode 2x06: Argue the Facts (Aug 1, 2023)
- Episode 2x05: Two Truths and a Lie (Jul 25, 2023)
- Episode 2x04: Kamikaze (Jul 18, 2023)
- Episode 2x03: Do No Harm (Jul 11, 2023)
- Episode 2x02: Trust Me (Jul 4, 2023)
- Episode 2x01: After the Morning After (Jul 4, 2023)
- Episode 1x08: Man on Fire (May 17, 2022)
- Episode 1x07: The Two Trials (May 10, 2022)
- Episode 1x06: Sins of the Fathers (May 3, 2022)
- Episode 1x05: Over the Wall (Apr 26, 2022)
- Episode 1x04: Chess Moves and Poker Chips (Apr 19, 2022)
- Episode 1x03: Barefoot and Dangerous (Apr 12, 2022)
- Episode 1x02: The Hunter and the Hunted (Apr 5, 2022)
- Episode 1x01: Pilot (Mar 29, 2022)
Your Honor (2020)
Guest starring as Father Jay
(3 episodes)
- Episode 2x10: Part Twenty (Mar 17, 2023)
- Episode 2x07: Part Seventeen (Feb 24, 2023)
- Episode 2x06: Part Sixteen (Feb 17, 2023)
Perry Mason (2020)
Guest starring as Thomas Milligan
(7 episodes)
- Episode 2x08: Chapter Sixteen (Apr 24, 2023)
- Episode 2x07: Chapter Fifteen (Apr 17, 2023)
- Episode 2x06: Chapter Fourteen (Apr 10, 2023)
- Episode 2x05: Chapter Thirteen (Apr 3, 2023)
- Episode 2x04: Chapter Twelve (Mar 27, 2023)
- Episode 2x03: Chapter Eleven (Mar 20, 2023)
- Episode 2x02: Chapter Ten (Mar 13, 2023)
The Kelly Clarkson Show (2019)
Guest starring as Mark O'Brien
- Episode 3x156: Idina Menzel, Barlow & Bear, Talia Suskauer, Mark O'Brien (May 18, 2022)
City on a Hill (2019)
Starring as Jimmy Ryan
(14 episodes)
- Episode 2x04: Overtime White and Overtime Stupid (Apr 18, 2021)
- Episode 2x03: Is the Total Black, Being Spoken (Apr 11, 2021)
- Episode 2x02: I Need a Goat (Apr 4, 2021)
- Episode 2x01: Bill Russell's Bedsheets (Mar 28, 2021)
- Episode 1x10: Mayor Curley and the Last Hurrah (Aug 18, 2019)
- Episode 1x09: The Deaf Sage of Pompeii (Aug 11, 2019)
- Episode 1x08: High on the Looming Gallows Tree (Aug 4, 2019)
- Episode 1x07: There Are No F**king Sides (Jul 28, 2019)
- Episode 1x06: It's Hard to Be a Saint in the City (Jul 21, 2019)
- Episode 1x05: From Injustice Came the Way to Describe Justice (Jul 14, 2019)
- Episode 1x04: The Wickedness of the Wicked Shall Be upon Himself (Jul 7, 2019)
- Episode 1x03: If Only the Fool Would Persist in His Folly (Jun 30, 2019)
- Episode 1x02: What They Saw in Southie High (Jun 23, 2019)
- Episode 1x01: The Night Flynn Sent the Cops on the Ice (Jun 16, 2019)
The Last Tycoon (2016)
Starring as Max Miner
(9 episodes)
- Episode 1x09: Oscar, Oscar, Oscar (Jul 28, 2017)
- Episode 1x08: An Enemy Among Us (Jul 28, 2017)
- Episode 1x07: A More Perfect Union (Jul 28, 2017)
- Episode 1x06: A Brady-American Christmas (Jul 28, 2017)
- Episode 1x05: Eine Kleine Reichmusik (Jul 28, 2017)
- Episode 1x04: Burying the Boy Genius (Jul 28, 2017)
- Episode 1x03: More Stars Than There Are in Heaven (Jul 28, 2017)
- Episode 1x02: Nobody Recasts Like Monroe (Jul 28, 2017)
- Episode 1x01: Pilot (Jun 17, 2016)
Halt and Catch Fire (2014)
Guest starring as Tom Rendon
(15 episodes)
- Episode 4x05: Nowhere Man (Sep 16, 2017)
- Episode 4x03: Miscellaneous (Aug 26, 2017)
- Episode 3x10: NeXT (Oct 11, 2016)
- Episode 3x08: You Are Not Safe (Oct 4, 2016)
- Episode 3x07: The Threshold (Sep 27, 2016)
- Episode 3x05: Yerba Buena (Sep 13, 2016)
- Episode 2x10: Heaven is a Place (Aug 2, 2015)
- Episode 2x09: Kali (Jul 26, 2015)
- Episode 2x08: Limbo (Jul 19, 2015)
- Episode 2x07: Working for the Clampdown (Jul 12, 2015)
- Episode 2x06: 10Broad36 (Jul 5, 2015)
- Episode 2x05: Extract and Defend (Jun 28, 2015)
- Episode 2x04: Play with Friends (Jun 21, 2015)
- Episode 2x03: The Way In (Jun 14, 2015)
- Episode 2x02: New Coke (Jun 7, 2015)
Hannibal (2013)
Guest starring as Randall Tier
(2 episodes)
- Episode 2x10: Naka-Choko (May 2, 2014)
- Episode 2x09: Shiizakana (Apr 25, 2014)
Republic of Doyle (2010)
Starring as Des Courtney
(77 episodes)
- Episode 6x10: Last Call (Dec 10, 2014)
- Episode 6x09: Judgement Day (Dec 10, 2014)
- Episode 6x08: Body of Evidence (Dec 3, 2014)
- Episode 6x07: When the Whistle Blows (Nov 26, 2014)
- Episode 6x06: The Pint (Nov 19, 2014)
- Episode 6x05: True Lies (Nov 12, 2014)
- Episode 6x04: The Driver (Nov 5, 2014)
- Episode 6x03: Smash Derby (Oct 29, 2014)
- Episode 6x02: No Rest for the Convicted (Oct 22, 2014)
- Episode 6x01: Dirty Deeds (Oct 15, 2014)
- Episode 5x16: Buried (Feb 5, 2014)
- Episode 5x15: Expansion (Feb 5, 2014)
- Episode 5x14: If the Shoe Fits (Jan 29, 2014)
- Episode 5x13: Welcome Back Crocker (Jan 22, 2014)
- Episode 5x12: Sleight of Hand (Jan 15, 2014)
- Episode 5x11: Frame Job (Jan 8, 2014)
- Episode 5x10: Brothers in Arms (Dec 11, 2013)
- Episode 5x09: Major Crimes (Dec 4, 2013)
- Episode 5x08: Young Guns (Nov 27, 2013)
- Episode 5x07: Hook, Line, and Sinker (Nov 20, 2013)
- Episode 5x06: Missing (Nov 13, 2013)
- Episode 5x05: The Works (Oct 30, 2013)
- Episode 5x04: Gun for Hire (Oct 23, 2013)
- Episode 5x03: Firecracker (Oct 16, 2013)
- Episode 5x02: The Overpass (Oct 9, 2013)
- Episode 5x01: Bon Cop, Bueno Cop (Oct 2, 2013)
- Episode 4x13: What Doesn't Kill You (Apr 21, 2013)
- Episode 4x12: Return of the Kingpin (Apr 21, 2013)
- Episode 4x11: The Devil Inside (Apr 14, 2013)
- Episode 4x10: Gimme Shelter (Apr 7, 2013)
- Episode 4x09: Retribution (Mar 31, 2013)
- Episode 4x08: Multitasking (Mar 24, 2013)
- Episode 4x07: In Brigus (Feb 24, 2013)
- Episode 4x06: The Common Wealth (Feb 17, 2013)
- Episode 4x05: The Heroine (Feb 10, 2013)
- Episode 4x04: Carlotta's Way (Jan 27, 2013)
- Episode 4x03: Identity Crisis (Jan 20, 2013)
- Episode 4x02: Blood Work (Jan 13, 2013)
- Episode 4x01: From Dublin with Love (Jan 6, 2013)
- Episode 3x13: Under Pressure (Apr 4, 2012)
- Episode 3x12: Con, Steal, Love (Mar 28, 2012)
- Episode 3x11: Live Wire (Mar 21, 2012)
- Episode 3x10: One Angry Jake (Mar 14, 2012)
- Episode 3x09: Mirror, Mirror (Mar 7, 2012)
- Episode 3x08: Two Jakes and a Baby (Feb 29, 2012)
- Episode 3x07: High School Confidential (Feb 22, 2012)
- Episode 3x06: The Dating Game (Feb 15, 2012)
- Episode 3x05: Dead Man Talking (Feb 8, 2012)
- Episode 3x04: Rusted Steele (Feb 1, 2012)
- Episode 3x03: Hot Package (Jan 25, 2012)
- Episode 3x02: Head Over Heels (Jan 18, 2012)
- Episode 3x01: Streets of St. John's (Jan 11, 2012)
- Episode 2x13: Family Business (Apr 6, 2011)
- Episode 2x12: St. John's Town (Mar 30, 2011)
- Episode 2x11: Don't Gamble with City Hall (Mar 23, 2011)
- Episode 2x10: The Special Detective (Mar 16, 2011)
- Episode 2x09: Will the Real Des Courtney Please Stand Up? (Mar 9, 2011)
- Episode 2x08: Sympathy for the Devil (Mar 2, 2011)
- Episode 2x07: Crashing on the Couch (Feb 23, 2011)
- Episode 2x06: The Ryans and the Pittmans (Feb 16, 2011)
- Episode 2x05: Something Old, Someone Blue (Feb 9, 2011)
- Episode 2x04: The Son Also Rises (Feb 2, 2011)
- Episode 2x03: A Stand Up Guy (Jan 26, 2011)
- Episode 2x02: Popeye Doyle (Jan 19, 2011)
- Episode 2x01: Live and Let Doyle (Jan 12, 2011)
- Episode 1x12: The Fall of the Republic (Apr 7, 2010)
- Episode 1x11: A Horse Divided (Mar 31, 2010)
- Episode 1x10: The Pen is Mightier Than the Doyle (Mar 24, 2010)
- Episode 1x09: He Sleeps with the Chips (Mar 17, 2010)
- Episode 1x08: The Tell-Tale Safe (Mar 10, 2010)
- Episode 1x07: The Woman Who Knew Too Little (Mar 2, 2010)
- Episode 1x06: The One Who Got Away (Feb 10, 2010)
- Episode 1x05: Hit and Rum (Feb 3, 2010)
- Episode 1x04: Blood is Thicker Than Blood (Jan 27, 2010)
- Episode 1x03: Duchess of George (Jan 20, 2010)
- Episode 1x02: The Return of the Grievous Angel (Jan 13, 2010)
- Episode 1x01: Fathers and Sons (Jan 6, 2010)
Warehouse 13 (2009)
Guest starring as Jerry
- Episode 3x06: Don't Hate the Player (Aug 15, 2011) [Co-Star]
Murdoch Mysteries (2008)
Guest starring as Jerome Bradley
- Episode 5x12: Murdoch Night in Canada (May 15, 2012)
Crew Credits
Republic of Doyle (2010)
Episode crew as Director
- Episode 6x02: No Rest for the Convicted (Oct 22, 2014)