Brian Geraghty is an American actor, known for his roles in the 2005 film Jarhead, the 2008 film The Hurt Locker, and the 2012 film Flight, along with his recurring role in the HBO drama series Boardwalk Empire. He appeared as a regular on NBC's Chicago P.D. from 2014 to 2016 and played Theodore Roosevelt in the TV series The Alienist. From 2020 to 2022, he portrayed Ronald Pergman on the ABC thriller drama Big Sky. He had a main role as Ranch Foreman Zane Davis on the Paramount+ western series 1923 (2022–2025).

Early life

Geraghty grew up in Toms River, New Jersey, and is of Irish descent. He graduated from Toms River High School East in 1993 and then studied acting at the Neighborhood Playhouse School of Theatre before beginning his professional career in New York City; he later moved to Los Angeles.

Career

Geraghty was featured in a small role in the crime drama The Sopranos. Feature roles soon followed, in such pictures as Jarhead, Bobby, The Guardian, We Are Marshall, and The Hurt Locker. He also appeared in the January 6, 2010, episode of Law & Order: Special Victims Unit, "Quickie", as a man intentionally infecting women with HIV. In 2013, he portrayed Agent Knox on the HBO crime drama series Boardwalk Empire. In August 2014, Geraghty was cast as a series regular on the second season of the NBC procedural Chicago P.D., playing Sean Roman. In 2018, Geraghty starred in the TNT drama The Alienist, as NYPD Police Commissioner Theodore Roosevelt.

Personal life

In his free time, Geraghty enjoys surfing.

Filmography

Geraghty with fellow actor Jeremy Renner in April 2010

Film

YearTitleRoleNotes
2002Petty CrimesRookie Cop
Town DiaryYoung Frank Ryan
2003Earl & PuppyTerryShort film
2004StatesideChris
2005Conversations with Other WomenGroom
Cruel WorldCollin
JarheadPrivate First Class Fergus O'Donnell
2006Art School ConfidentialStoob
BobbyJimmy
The Elder SonGreg
The GuardianBilly Hodge
We Are MarshallTom Bogdan
When a Stranger CallsBobby
2007An American CrimeBradley
I Know Who Killed MeJerrod Pointer
2008The Hurt LockerOwen Eldridge
Love Lies Bleeding"Duke"Direct-to-video
2009Easier with PracticeDavy Mitchell
2010BastardManShort film
The ChameleonBrian Jansen
KrewsHenry McFarlin
Open HouseDavid
The Second Bakery AttackDanShort film
2011Seven Days in UtopiaJake
10 YearsGarrity Liamsworth
2012ATMDavid Hargrove
FlightKen Evans
RefugeSam
2013Ass BackwardsBrian Hickman
KilimanjaroDoug
2014Date and SwitchLars
The IdenticalWilliam Hemsley
Loitering with IntentDevon
WildLikeUncle
2017My Days of MercyWeldon
AvenuesJack
2018The Standoff at Sparrow CreekNoah
2019Extremely Wicked, Shockingly Evil and VileDan Dowd
FaithChris
2020BlindfireWill Bishop
2024Red Right HandSheriff Hollister
The Luckiest Man in AmericaEd

Television

YearTitleRoleNotes
1999Law & OrderPhillip LudwickEpisode: "Hate"
The SopranosCounter BoyEpisode: "The Legend of Tennessee Moltisanti"
2001EdAriEpisode: "Windows of Opportunity"
2010, 2015Law & Order: Special Victims UnitPeter Butler / Sean RomanEpisodes: "Quickie" and "Daydream Believer"
2012True BloodBrian Eller3 episodes
2013Boardwalk EmpireWarren Knox / Jim TolliverRecurring role (season 4)
2014Ray DonovanJim HalloranRecurring role (season 2)
2014–2020Chicago P.D.Sean RomanMain cast (seasons 2–3); guest (season 7)
Chicago FireRecurring role; 9 episodes
2015–2016Chicago MedGuest role; 3 episodes
2018The AlienistTheodore RooseveltMain cast
2020BriarpatchGene ColderMain cast
The FugitiveColin MurphyMain cast
2020–2022Big SkyRonald PergmanMain cast (Seasons 1 & 2)
2022GaslitPeterRecurring role
2022–20251923Zane DavisMain cast; miniseries

Awards and nominations

YearAwardCategoryWorkResult
2007Screen Actors Guild AwardOutstanding Performance by a Cast in a Motion PictureBobbyNominated
2009Gotham AwardBest Ensemble PerformanceThe Hurt LockerWon
2009Washington D.C. Area Film Critics Association AwardBest EnsembleThe Hurt LockerWon
2010Screen Actors Guild AwardOutstanding Performance by a Cast in a Motion PictureThe Hurt LockerNominated
2014Screen Actors Guild AwardOutstanding Performance by an Ensemble in a Drama SeriesBoardwalk EmpireNominated

External links