Originally from Jersey, Brian Geraghty (born Brian Timothy Geraghty) graduated from The Neighborhood Playhouse School of Theatre and then began his professional career in New York City before moving to Los Angeles. He has previously enjoyed being a surf instructor and continues to surf in his free time.
Known For
Credits
Cast Credits
1923 (2022)
Starring as Zane Davis
(13 episodes)
- Episode 2x07: A Dream and a Memory (Apr 6, 2025)
- Episode 2x06: The Mountain Teeth of Monsters (Mar 30, 2025)
- Episode 2x04: Journey the Rivers of Iron (Mar 16, 2025)
- Episode 2x03: Wrap Thee in Terror (Mar 9, 2025)
- Episode 2x02: The Rapist is Winter (Mar 2, 2025)
- Episode 1x08: Nothing Left to Lose (Feb 26, 2023)
- Episode 1x07: The Rule of Five Hundred (Feb 19, 2023)
- Episode 1x06: One Ocean Closer to Destiny (Feb 12, 2023)
- Episode 1x05: Ghost of Zebrina (Feb 5, 2023)
- Episode 1x04: War and the Turquoise Tide (Jan 8, 2023)
- Episode 1x03: The War Has Come Home (Jan 1, 2023)
- Episode 1x02: Nature's Empty Throne (Dec 25, 2022)
- Episode 1x01: 1923 (Dec 18, 2022)
Gaslit (2022)
Guest starring as Peter Bailin
(2 episodes)
- Episode 1x03: King George (May 8, 2022)
- Episode 1x02: California (May 1, 2022)
Big Sky (2020)
Starring as Ronald Pergman
(28 episodes)
- Episode 2x12: A Good Boy (Mar 17, 2022)
- Episode 2x11: Do No Harm (Mar 10, 2022)
- Episode 2x10: Happy Thoughts (Mar 3, 2022)
- Episode 2x09: Trust Issues (Feb 24, 2022)
- Episode 2x08: The End Has No End (Dec 16, 2021)
- Episode 2x07: Little Boxes (Dec 9, 2021)
- Episode 2x06: Heart-Shaped Charm (Nov 18, 2021)
- Episode 2x05: Mother Nurture (Nov 11, 2021)
- Episode 2x04: Gettin' Right to It (Oct 21, 2021)
- Episode 2x03: You Have to Play Along (Oct 14, 2021)
- Episode 2x02: Huckleberry (Oct 7, 2021)
- Episode 2x01: Wakey, Wakey (Sep 30, 2021)
- Episode 1x16: Love is a Strange and Dangerous Thing (May 18, 2021)
- Episode 1x15: Bitter Roots (May 11, 2021)
- Episode 1x14: Nice Animals (May 4, 2021)
- Episode 1x13: White Lion (Apr 27, 2021)
- Episode 1x12: No Better Than Dogs (Apr 20, 2021)
- Episode 1x11: All Kinds of Snakes (Apr 13, 2021)
- Episode 1x10: Catastrophic Thinking (Apr 13, 2021)
- Episode 1x09: Let It Be Him (Feb 16, 2021)
- Episode 1x08: The End is Near (Feb 9, 2021)
- Episode 1x07: I Fall to Pieces (Feb 2, 2021)
- Episode 1x06: The Wolves Are Always Out for Blood (Jan 26, 2021)
- Episode 1x05: A Good Day to Die (Dec 15, 2020)
- Episode 1x04: Unfinished Business (Dec 8, 2020)
- Episode 1x03: The Big Rick (Dec 1, 2020)
- Episode 1x02: Nowhere to Run (Nov 24, 2020)
- Episode 1x01: Pilot (Nov 17, 2020)
The Fugitive (2020)
Starring as Colin Murphy
(7 episodes)
- Episode 1x14: How It All Ends (Aug 18, 2020)
- Episode 1x13: When Mike Met Colin (Aug 17, 2020)
- Episode 1x12: Changing Direction (Aug 14, 2020)
- Episode 1x07: Again (Aug 7, 2020)
- Episode 1x06: A Lifeline (Aug 6, 2020)
- Episode 1x05: When Mike Met Clay (Aug 5, 2020)
- Episode 1x02: Smile for the Camera (Aug 3, 2020)
Briarpatch (2020)
Starring as Captain Gene Colder
(10 episodes)
- Episode 1x10: Felicity (Apr 13, 2020)
- Episode 1x09: Game Theory and Mescaline (Apr 6, 2020)
- Episode 1x08: Most Likely to Succeed (Mar 30, 2020)
- Episode 1x07: Butterscotch (Mar 23, 2020)
- Episode 1x06: The Most Sinful Mf-er Alive (Mar 16, 2020)
- Episode 1x05: Behind God's Back (Mar 9, 2020)
- Episode 1x04: Breadknife Weather (Mar 2, 2020)
- Episode 1x03: Terrible, Shocking Things (Feb 24, 2020)
- Episode 1x02: Snap, Crackle, Pop (Feb 13, 2020)
- Episode 1x01: First Time in Saint Disgrace (Feb 6, 2020)
The Alienist (2018)
Starring as Theodore Roosevelt
(10 episodes)
- Episode 1x10: Castle in the Sky (Mar 26, 2018)
- Episode 1x09: Requiem (Mar 19, 2018)
- Episode 1x08: Psychopathia Sexualis (Mar 12, 2018)
- Episode 1x07: Many Sainted Men (Mar 5, 2018)
- Episode 1x06: Ascension (Feb 26, 2018)
- Episode 1x05: Hildebrandt's Starling (Feb 19, 2018)
- Episode 1x04: These Bloody Thoughts (Feb 12, 2018)
- Episode 1x03: Silver Smile (Feb 5, 2018)
- Episode 1x02: A Fruitful Partnership (Jan 29, 2018)
- Episode 1x01: The Boy on the Bridge (Jan 22, 2018)
Chicago P.D. (2014)
Starring as Officer Sean Roman
(46 episodes)
- Episode 3x23: Start Digging (May 25, 2016)
- Episode 3x22: She's Got Us (May 18, 2016)
- Episode 3x21: Justice (May 11, 2016)
- Episode 3x20: In a Duffel Bag (May 4, 2016)
- Episode 3x19: If We Were Normal (Mar 30, 2016)
- Episode 3x18: Kasual with a K (Mar 23, 2016)
- Episode 3x17: Forty-Caliber Bread Crumb (Mar 2, 2016)
- Episode 3x16: The Cases That Need to Be Solved (Feb 24, 2016)
- Episode 3x15: A Night Owl (Feb 17, 2016)
- Episode 3x14: The Song of Gregory Williams Yates (Feb 10, 2016)
- Episode 3x13: Hit Me (Feb 3, 2016)
- Episode 3x12: Looking Out for Stateville (Jan 20, 2016)
- Episode 3x11: Knocked the Family Right Out (Jan 13, 2016)
- Episode 3x10: Now I'm God (Jan 6, 2016)
- Episode 3x09: Never Forget I Love You (Nov 18, 2015)
- Episode 3x08: Forget My Name (Nov 11, 2015)
- Episode 3x07: A Dead Kid, a Notebook and a Lot of Maybes (Nov 4, 2015)
- Episode 3x06: You Never Know Who's Who (Oct 28, 2015)
- Episode 3x05: Climbing Into Bed (Oct 28, 2015)
- Episode 3x04: Debts of the Past (Oct 21, 2015)
- Episode 3x03: Actual Physical Violence (Oct 14, 2015)
- Episode 3x02: Natural Born Storyteller (Oct 7, 2015)
- Episode 3x01: Life is Fluid (Sep 30, 2015)
- Episode 2x23: Born Into Bad News (May 20, 2015)
- Episode 2x22: Push the Pain Away (May 13, 2015)
- Episode 2x21: There's My Girl (May 6, 2015)
- Episode 2x20: The Number of Rats (Apr 29, 2015)
- Episode 2x19: The Three G's (Apr 8, 2015)
- Episode 2x18: Get Back to Even (Apr 1, 2015)
- Episode 2x17: Say Her Real Name (Mar 25, 2015)
- Episode 2x16: What Puts You on That Ledge (Feb 25, 2015)
- Episode 2x15: What Do You Do (Feb 18, 2015)
- Episode 2x14: Erin's Mom (Feb 11, 2015)
- Episode 2x13: A Little Devil Complex (Feb 4, 2015)
- Episode 2x12: Disco Bob (Jan 21, 2015)
- Episode 2x11: We Don't Work Together Anymore (Jan 14, 2015)
- Episode 2x10: Shouldn't Have Been Alone (Jan 7, 2015)
- Episode 2x09: Called in Dead (Dec 10, 2014)
- Episode 2x08: Assignment of the Year (Nov 19, 2014)
- Episode 2x07: They'll Have to Go Through Me (Nov 12, 2014)
- Episode 2x06: Prison Ball (Nov 5, 2014)
- Episode 2x05: An Honest Woman (Oct 22, 2014)
- Episode 2x04: Chicken, Dynamite, Chainsaw (Oct 15, 2014)
- Episode 2x03: The Weigh Station (Oct 8, 2014)
- Episode 2x02: Get My Cigarettes (Oct 1, 2014)
- Episode 2x01: Call It Macaroni (Sep 24, 2014)
Guest starring as Officer Sean Roman
- Episode 7x15: Burden of Truth (Feb 26, 2020) [Special Guest Star]
Ray Donovan (2013)
Guest starring as Jim Halloran
(9 episodes)
- Episode 2x12: The Captain (Sep 28, 2014)
- Episode 2x11: Rodef (Sep 21, 2014)
- Episode 2x10: Volcheck (Sep 14, 2014)
- Episode 2x09: Snowflake (Sep 7, 2014)
- Episode 2x08: Sunny (Aug 31, 2014)
- Episode 2x07: Walk This Way (Aug 24, 2014)
- Episode 2x06: Viagra (Aug 17, 2014)
- Episode 2x05: Irish Spring (Aug 10, 2014)
- Episode 2x04: S U C K (Aug 3, 2014)
Chicago Fire (2012)
Guest starring as Sean Roman
(9 episodes)
- Episode 8x15: Off the Grid (Feb 26, 2020) [Special Guest Star]
- Episode 4x16: Two T's (Feb 23, 2016)
- Episode 4x14: All Hard Parts (Feb 9, 2016)
- Episode 4x03: I Walk Away (Oct 27, 2015)
- Episode 3x23: Spartacus (May 12, 2015)
- Episode 3x18: Forgiving, Relentless, Unconditional (Mar 17, 2015)
- Episode 3x15: Headlong Toward Disaster (Feb 17, 2015)
- Episode 3x13: Three Bells (Feb 3, 2015)
- Episode 3x04: Apologies Are Dangerous (Oct 14, 2014)
Boardwalk Empire (2010)
Guest starring as Agent Warren Knox / Jim Tolliver
(9 episodes)
- Episode 4x12: Farewell Daddy Blues (Nov 24, 2013)
- Episode 4x11: Havre De Grace (Nov 17, 2013)
- Episode 4x10: White Horse Pike (Nov 10, 2013)
- Episode 4x08: The Old Ship of Zion (Oct 27, 2013)
- Episode 4x06: The North Star (Oct 13, 2013)
- Episode 4x05: Erlkönig (Oct 6, 2013)
- Episode 4x04: All In (Sep 29, 2013)
- Episode 4x02: Resignation (Sep 15, 2013)
- Episode 4x01: New York Sour (Sep 8, 2013)
True Blood (2008)
Guest starring as Brian Eller
(3 episodes)
- Episode 5x05: Let's Boot and Rally (Jul 8, 2012)
- Episode 5x04: We'll Meet Again (Jul 1, 2012)
- Episode 5x02: Authority Always Wins (Jun 17, 2012)
Made in Hollywood (2005)
Guest starring as Brian Geraghty
- Episode 20x23: The Monkey, Reacher: Season 3, 1923: Season 2 (Mar 1, 2025)
Law & Order: Special Victims Unit (1999)
Guest starring as Peter Butler
- Episode 11x11: Quickie (Jan 6, 2010)
Guest starring as Officer Sean Roman
- Episode 16x20: Daydream Believer (Apr 29, 2015)
The Sopranos (1999)
Guest starring as Counter Boy
- Episode 1x08: The Legend of Tennessee Moltisanti (Feb 28, 1999) [Co-Star]