Directed credits
3
Emerging
Beginning to build directing work.
Director
Mark O'Brien
Acting
Career Snapshot
ExplainedThese indicators come from TMDB. They are relative signals, not review ratings.
TMDB popularity
0.8
Low visibility
TMDB internal trend index. Higher usually means more searches and page activity now.
Directed movies: 3Directed series: 0All crew credits: 6
TMDB ID: 225411
IMDb ID: nm1975628
Known for: Acting
Born: May 7, 1984
Age: 42
Place of birth: St. Johns, Newfoundland, Canada
Gender: Male
Adult content flag: No
Career span: 2008 - 2026
Years active: 19
Average TMDB rating: 6.6
Wikidata: Q15867224
Frequent jobs
Director (3)Executive Producer (1)Producer (1)Writer (1)
Biography
Mark O'Brien (born May 7th, 1984) is a Canadian actor and director. He is best known for playing the role of Des Courtney in Republic of Doyle (2010) and Tom Rendon in Halt and Catch Fire (2014).
Photos
Movies
Directed Movies
Movies directed by Mark O'Brien.
Movies
Top Rated Movies
Highest rated movies linked with Mark O'Brien.
as Carter Mitchum
Marriage Story
2019 • Movie
as Captain Marks
Arrival
2016 • Movie
as Colonel John Amen
Nuremberg
2025 • Movie
as Ace
Blue Bayou
2021 • Movie
as Alex
Ready or Not
2019 • Movie
as Rob Meadows
The Darkest Minds
2018 • Movie
as Larsen Rogers
Bad Times at the El Royale
2018 • Movie
as Jake
Kin
2018 • Movie
as Cyrus Frear
Anon
2018 • Movie
as Josh
Parallel
2018 • Movie
as Billy Shore
The Front Runner
2018 • Movie
as Jeremiah
How It Ends
2018 • Movie
Series
Top Rated Series
Highest rated series linked with Mark O'Brien.
as Randall Tier • 2 eps
Hannibal
2013 • Series
as Father Jay • 3 eps
Your Honor
2020 • Series
as Tom Rendon • 15 eps
Halt and Catch Fire
2014 • Series
as Jerry Hoffler • 1 eps
Warehouse 13
2009 • Series
as Jimmy Ryan • 14 eps
City on a Hill
2019 • Series
as Thomas Milligan • 7 eps
Perry Mason
2020 • Series
as Grayson Hicks • 1 eps
Killjoys
2015 • Series
as Edmund Cobb • 8 eps
The Copenhagen Test
2025 • Series
Movies
Most Popular Movies
Most viewed movie titles linked with Mark O'Brien.
The Outer Threat
2026 • Movie
as Alex
Ready or Not
2019 • Movie
as Colonel John Amen
Nuremberg
2025 • Movie
as Captain Marks
Arrival
2016 • Movie
as Larsen Rogers
Bad Times at the El Royale
2018 • Movie
as Carter Mitchum
Marriage Story
2019 • Movie
as Rob Meadows
The Darkest Minds
2018 • Movie
as Jeremiah
How It Ends
2018 • Movie
as Cyrus Frear
Anon
2018 • Movie
as Jake
Kin
2018 • Movie
as Josh
Parallel
2018 • Movie
as Billy Shore
The Front Runner
2018 • Movie
Series
Most Popular Series
Most viewed series linked with Mark O'Brien.
as Self • 1 eps
The Kelly Clarkson Show
2019 • Series
as Randall Tier • 2 eps
Hannibal
2013 • Series
as Jerry Hoffler • 1 eps
Warehouse 13
2009 • Series
as Des Courtney • 77 eps
Republic of Doyle
2010 • Series
as Thomas Milligan • 7 eps
Perry Mason
2020 • Series
as Tom Rendon • 15 eps
Halt and Catch Fire
2014 • Series
as Grayson Hicks • 1 eps
Killjoys
2015 • Series
as Father Jay • 3 eps
Your Honor
2020 • Series
as Max Miner • 9 eps
The Last Tycoon
2017 • Series
as Jimmy Ryan • 14 eps
City on a Hill
2019 • Series
as Edmund Cobb • 8 eps
The Copenhagen Test
2025 • Series
as Officer Logan • 8 eps
61st Street
2022 • Series
Movies
Other Crew Work in Movies
Additional movie credits for Mark O'Brien.
Movies
Acting Appearances in Movies
Movie cast credits for Mark O'Brien.
The Outer Threat
2026 • Movie
as William
The Voices of Our Mother
2026 • Movie
as Colonel John Amen
Nuremberg
2025 • Movie
as Elizeus Carrier
The Memory Keeper
2025 • Movie
as Mason Harper
Shadow of God
2025 • Movie
as Paul
Seven Veils
2025 • Movie
as Topper
Topper
2025 • Movie
as Ace
Blue Bayou
2021 • Movie
as Aaron Smith
The Righteous
2021 • Movie
as Chris Davis
Hammer
2019 • Movie
as Carter Mitchum
Marriage Story
2019 • Movie
as Alex
Ready or Not
2019 • Movie
Series
Acting Appearances in Series
Series cast credits for Mark O'Brien.
as Edmund Cobb • 8 eps
The Copenhagen Test
2025 • Series
as Charlie • 1 eps
The Sticky
2024 • Series
as Officer Logan • 8 eps
61st Street
2022 • Series
as Father Jay • 3 eps
Your Honor
2020 • Series
as Thomas Milligan • 7 eps
Perry Mason
2020 • Series
as Self • 1 eps
The Kelly Clarkson Show
2019 • Series
as Jimmy Ryan • 14 eps
City on a Hill
2019 • Series
as Max Miner • 9 eps
The Last Tycoon
2017 • Series
as Grayson Hicks • 1 eps
Killjoys
2015 • Series
as Tom Rendon • 15 eps
Halt and Catch Fire
2014 • Series
as Randall Tier • 2 eps
Hannibal
2013 • Series
as Des Courtney • 77 eps
Republic of Doyle
2010 • Series