
Brian Timothy Geraghty (born May 13, 1974) is an American film and television actor, best known for his roles as Ronald Pergman on Big Sky, Dale on the series The Fugitive, Gene Colder on Briarpatch, Theodore Roosevelt on The Alienist, Police Officer Sean Roman on Chicago P.D., Specialist Owen Eldredge in the Academy Award-winning film The Hurt Locker, Tom Bogdan in We Are Marshall, Billy Hodge in The Guardian, and Fergus O'Donnell in Jarhead.

The Hurt Locker
2008 · as Specialist Owen Eldridge

The Guardian
2006 · as Billy Hodge

Flight
2012 · as Ken Evans

Jarhead
2005 · as Fergus O'Donnell

Extremely Wicked, Shockingly Evil and Vile
2019 · as Florida Public Defender Dan Dowd

We Are Marshall
2006 · as Tom Bogdan

Red Right Hand
2024 · as Sheriff Hollister

An American Crime
2007 · as Bradley

When a Stranger Calls
2006 · as Bobby

Art School Confidential
2006 · as Stoob

"Jarhead" Diaries
2006 · as Self

I Know Who Killed Me
2007 · as Jerrod Pointer

Bobby
2006 · as Jimmy

10 Years
2012 · as Garrity

Date and Switch
2014 · as Lars

Ass Backwards
2013 · as Brian

My Days of Mercy
2018 · as Weldon

ATM
2012 · as David Hargrove