Justin Swain is an American actor. His acting career started in 2006 when he appeared in an episode of Law & Order: Special Victims Unit. He next guest-starred in an episode of Boardwalk Empire. He went on to land more one-episode roles in such TV shows as Law & Order, Forever, and The Blacklist. Swain later became known for his recurring role as Detective Mark Bailey in the Netflix series Luke Cage, which he starred in from 2016 to 2018, until its cancellation. In the movies, the actor made his debut playing the role of Neil Sheehan in the Steven Spielberg feature film The Post.