Brian Geraghty

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. 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

Film Year Title Role Notes 2002 Petty Crimes Rookie Cop Town Diary Young Frank Ryan 2003 Earl & Puppy Terry Short film 2004 Stateside Chris 2005 Conversations with Other Women Groom Cruel World Collin Jarhead Private First Class Fergus O'Donnell 2006 Art School Confidential Stoob Bobby Jimmy The Elder Son Greg The Guardian Billy Hodge We Are Marshall Tom Bogdan When a Stranger Calls Bobby 2007 An American Crime Bradley I Know Who Killed Me Jerrod Pointer 2008 The Hurt Locker Owen Eldridge Love Lies Bleeding "Duke" Direct-to-video 2009 Easier with Practice Davy Mitchell 2010 Bastard Man Short film The Chameleon Brian Jansen Krews Henry McFarlin Open House David The Second Bakery Attack Dan Short film 2011 Seven Days in Utopia Jake 10 Years Garrity Liamsworth 2012 ATM David Hargrove Flight Ken Evans Refuge Sam 2013 Ass Backwards Brian Hickman Kilimanjaro Doug 2014 Date and Switch Lars The Identical William Hemsley Loitering with Intent Devon WildLike Uncle 2017 My Days of Mercy Weldon Avenues Jack 2018 The Standoff at Sparrow Creek Noah 2019 Extremely Wicked, Shockingly Evil and Vile Dan Dowd Faith Chris 2020 Blindfire Will Bishop 2024 Red Right Hand Sheriff Hollister The Luckiest Man in America Ed TBA Kockroach Post-production

Television Year Title Role Notes 1999 Law & Order Phillip Ludwick Episode: "Hate" The Sopranos Counter Boy Episode: "The Legend of Tennessee Moltisanti" 2001 Ed Ari Episode: "Windows of Opportunity" 2010, 2015 Law & Order: Special Victims Unit Peter Butler / Sean Roman Episodes: "Quickie" and "Daydream Believer" 2012 True Blood Brian Eller 3 episodes 2013 Boardwalk Empire Warren Knox / Jim Tolliver Recurring role (season 4) 2014 Ray Donovan Jim Halloran Recurring role (season 2) 2014–2020 Chicago P.D.Sean Roman Main cast (seasons 2–3); guest (season 7) Chicago Fire Recurring role; 9 episodes 2015–2016 Chicago Med Guest role; 3 episodes 2018 The Alienist Theodore Roosevelt Main cast 2020 Briarpatch Gene Colder Main cast The Fugitive Colin Murphy Main cast 2020–2022 Big Sky Ronald Pergman Main cast (Seasons 1 & 2) 2022 Gaslit Peter Recurring role 2022–2025 1923 Zane DavisMain cast; miniseries

Awards and nominations Year Award Category Work Result 2007 Screen Actors Guild Award Outstanding Performance by a Cast in a Motion Picture Bobby 2009 Gotham Award Best Ensemble Performance The Hurt Locker 2009 Washington D.C. Area Film Critics Association Award Best Ensemble The Hurt Locker 2010 Screen Actors Guild Award Outstanding Performance by a Cast in a Motion Picture The Hurt Locker 2014 Screen Actors Guild Award Outstanding Performance by an Ensemble in a Drama Series Boardwalk Empire