
Acting
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 Luckiest Man in America
as Ed

Red Right Hand
as Sheriff Hollister

Blindfire
as Will Bishop

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

The Standoff at Sparrow Creek
as Noah

Avenues
as Jack

Faith
as Chris

My Days of Mercy
as Weldon

Wildlike
as Uncle

Verbatim: The Ferguson Case
as Darren Wilson

1923
as Zane Davis · 15 ep.

Gaslit
as Peter · 2 ep.

Big Sky
as Ronald Pergman · 34 ep.

The Fugitive
as Dale · 14 ep.

Briarpatch
as Gene Colder · 10 ep.

The Alienist
as Theodore Roosevelt · 10 ep.

Chicago Med
as Sean Roman · 3 ep.

Chicago P.D.
as Sean Roman · 47 ep.

Chicago Fire
as Sean Roman · 6 ep.

Boardwalk Empire
as Agent Warren Knox · 1 ep.
Chicago Med
2015