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Brian Geraghty

Acting Born May 13, 1974 Toms River, New Jersey, USA 61 credits

Biography

Brian Timothy Geraghty is an American film and television actor. He was born on May 13, 1974. Geraghty has appeared in various roles, including Ronald Pergman on Big Sky, Dale on The Fugitive, Gene Colder on Briarpatch, Theodore Roosevelt on The Alienist, Police Officer Sean Roman on Chicago P.D., Specialist Owen Eldredge in The Hurt Locker, Tom Bogdan in We Are Marshall, Billy Hodge in The Guardian, and Fergus O'Donnell in Jarhead.

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Known for

1923

as Zane Davis

Big Sky

as Ronald Pergman

Briarpatch

as Gene Colder
Film

Extremely Wicked, Shockingly Evil and Vile

as Florida Public Defender Dan Dowd
Film

Ice Bound

as Theodore Roosevelt

Chicago Med

as Sean Roman
Film

The Stanford Prison Experiment

2015

Chicago P.D.

as Sean Roman

Promise

as William Hemsley
Film

Othello

as Sean Roman
Film

Flight

as Ken Evans
Film

10 Years

as Garrity

Frequent co-stars

Ted Levine 2 shared titles
Anthony Mackie 2 shared titles
Jason Beghe 1 shared title
Marina Squerciati 1 shared title
Patrick John Flueger 1 shared title
LaRoyce Hawkins 1 shared title
Amy Morton 1 shared title
Jesse Lee Soffer 1 shared title
Tracy Spiridakos 1 shared title
Jon Seda 1 shared title

Career timeline

The Luckiest Man in America
Red Right Hand
1923Gaslit
Big SkyBriarpatchThe FugitiveBlindfire
Extremely Wicked, Shockingly Evil and VileAvenuesFaithThe Standoff at Sparrow Creek
The AlienistMy Days of Mercy
Chicago MedThe Stanford Prison Experiment · Executive ProducerWildlikeVerbatim: The Ferguson Case
Chicago P.D.Date and SwitchLoitering with IntentThe Identical
KilimanjaroAss Backwards
Chicago FireFlightATMHeroes and Demons10 Years
Seven Days in Utopia
Boardwalk EmpireThe ChameleonBastardThe Second Bakery AttackOpen House
Easier with Practice
True BloodThe Hurt LockerLove Lies Bleeding
An American CrimeI Know Who Killed Me
The Guardian"Jarhead" DiariesWhen a Stranger CallsWe Are MarshallArt School Confidential
Jarhead
Town Diary
Ed
Law & Order: Special Victims UnitLaw & Order: Special Victims UnitThe Sopranos
Law & Order

Full filmography

  • The Luckiest Man in America (2025) as Ed
  • Red Right Hand (2024) as Sheriff Hollister
  • 1923 (2022) as Zane Davis
  • Gaslit (2022) as Peter
  • Big Sky (2020) as Ronald Pergman
  • Briarpatch (2020) as Gene Colder
  • The Fugitive (2020) as Dale
  • Blindfire (2020) as Will Bishop
  • Extremely Wicked, Shockingly Evil and Vile (2019) as Florida Public Defender Dan Dowd
  • Avenues (2019) as Jack
  • Faith (2019) as Chris
  • The Standoff at Sparrow Creek (2019) as Noah
  • The Alienist (2018) as Theodore Roosevelt
  • My Days of Mercy (2018) as Weldon
  • Chicago Med (2015) as Sean Roman
  • The Stanford Prison Experiment (2015) Executive Producer
  • Wildlike (2015) as Uncle
  • Verbatim: The Ferguson Case (2015) as Darren Wilson
  • Chicago P.D. (2014) as Sean Roman
  • Date and Switch (2014) as Lars
  • Loitering with Intent (2014) as Devon
  • The Identical (2014) as William Hemsley
  • Kilimanjaro (2013) as Doug
  • Ass Backwards (2013) as Brian
  • Chicago Fire (2012) as Sean Roman
  • Flight (2012) as Ken Evans
  • ATM (2012) as David Hargrove
  • Heroes and Demons (2012) as Dan (segment "The Second Bakery Attack")
  • 10 Years (2012) as Garrity
  • Refuge (2012) as Sam
  • Seven Days in Utopia (2011) as Jake
  • Boardwalk Empire (2010) as Agent Warren Knox
  • The Chameleon (2010) as Brian Jansen
  • Bastard (2010) as Man
  • The Second Bakery Attack (2010) as Dan
  • Open House (2010) as David
  • Jake Gyllenhaal Challenges the Winner of the Nobel Peace Prize (2010) as Fergus O'Donnell (archive footage)
  • Krews (2010) as Henry McFarlin
  • Easier with Practice (2009) as Davy Mitchell
  • True Blood (2008) as Brian Eller
  • The Hurt Locker (2008) as Specialist Owen Eldridge
  • Love Lies Bleeding (2008) as Duke
  • An American Crime (2007) as Bradley
  • I Know Who Killed Me (2007) as Jerrod Pointer
  • The Guardian (2006) as Billy Hodge
  • "Jarhead" Diaries (2006) as Self
  • When a Stranger Calls (2006) as Bobby
  • We Are Marshall (2006) as Tom Bogdan
  • Art School Confidential (2006) as Stoob
  • Bobby (2006) as Jimmy
  • The Elder Son (2006) as Greg
  • Conversations with Other Women (2006) as Groom
  • Cruel World (2006) as Collin
  • Jarhead (2005) as Fergus O'Donnell
  • Town Diary (2002) as Young Frank Ryan
  • Ed (2000) as Ari
  • Law & Order: Special Victims Unit (1999) as Peter Butler
  • Law & Order: Special Victims Unit (1999) as Sean Roman
  • The Sopranos (1999) as Counter Boy
  • Law & Order (1990) as Phillip Ludwick
  • Kockroach