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.
as Sheriff Hollister
as Zane Davis(15 eps)
as Peter(2 eps)
as Ronald Pergman(34 eps)
as Will Bishop
as Dale(14 eps)
as Gene Colder(10 eps)
as Chris
as Florida Public Defender Dan Dowd
as Jack
as Weldon
as Theodore Roosevelt(10 eps)
as Sean Roman(3 eps)
as Uncle
as Darren Wilson
as William Hemsley
as Devon
as Lars
as Sean Roman(47 eps)
as Doug
as Brian
as Sam
as Sean Roman(6 eps)
as Garrity
as Dan (segment "The Second Bakery Attack")
as Ken Evans
as David Hargrove
as Jake
as Dan
as Agent Warren Knox(1 ep)
as David
as Brian Jansen
as Man
as Henry McFarlin
as Fergus O'Donnell (archive footage)
as Davy Mitchell
as Specialist Owen Eldridge
as Brian Eller(3 eps)
as Duke
as Bradley
as Jerrod Pointer
as Tom Bogdan
as Collin
as Billy Hodge
as Jimmy
as Groom
as Stoob
as Self
as Bobby
as Greg
as Fergus O'Donnell
as Young Frank Ryan
as Ari(1 ep)
as Peter Butler(1 ep)
as Sean Roman(1 ep)
as Counter Boy(1 ep)
as Phillip Ludwick(1 ep)
