Brennan Brown is an American actor. He had his career beginnings in the early 2000s. He debuted in an episode of Law & Order: Special Victims Unit. He later appeared in the made-for-television film Monday Night Mayhem. Brown then had roles in the films The Girl in the Park, Turn the River, I Love You Phillip Morris, State of Play, and Detachment.
In the 2010s, he played recurring character Special Agent Nicholas Donnelly in the CBS Person of Interest. He next played Chief Ward in Beauty & the Beast and Edward Biben in Mozart in the Jungle. The actor became further known for his role as Robert Childan in Amazon’s The Man in the High Castle, which he has been playing since 2015.