Acting

Mark O'Brien

born 1984 · Acting

64.3avg grm

10titles

#428best rank

best title · #428 on siteArrival2016 · as Captain Marks78.0

Bio

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).

Filmography

ranked on this site

2020s6 titles

Nuremberg2025 · as Colonel John Amen68.0 C

The Copenhagen Test2025 · as Edmund Cobb · series61.7 S

The Sticky2024 · as Charlie · series62.5 6

61st Street2022 · as Johnny Logan · series64.2 6

61st Street2022 · as Logan · series64.2 B

Blue Bayou2021 · as Ace53.0

2010s4 titles

City on a Hill2019 · as Jimmy Ryan · series63.9 A

Arrival2016 · as Captain Marks78.0 L

The Last Tycoon2016 · as Max Miner · series63.6 R

Republic of Doyle2010 · as Des Courtney · series64.4

Browse the ranked list

you've reached the bottom

movies worth your night.

IMDb public datasets TMDB about contact API & docs pro import lists terms privacy code of conduct

This product uses TMDB and the TMDB APIs but is not endorsed, certified, or otherwise approved by TMDB.

Mark O'Brien

M

born1984

known forActing

titles on site10

best title rank#428 · Arrival (2016)

avg GRM64.3

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).

Filmography

ranked on this site

2020s

6 titles

68.0Nuremberg2025 · as Colonel John Amen C

61.7The Copenhagen Test2025 · as Edmund Cobb · series S

62.5The Sticky2024 · as Charlie · series 6

64.261st Street2022 · as Johnny Logan · series 6

64.261st Street2022 · as Logan · series B

53.0Blue Bayou2021 · as Ace

2010s

4 titles

63.9City on a Hill2019 · as Jimmy Ryan · series A

78.0Arrival2016 · as Captain Marks L

63.6The Last Tycoon2016 · as Max Miner · series R

64.4Republic of Doyle2010 · as Des Courtney · series

Browse the ranked list