Dean Winters is an American actor. His Hollywood career began in the mid ’90s. His first notable role on the small screen was on Homicide: Life on the Street. He next starred on the TV series Millennium. He became further known for his role as Ryan O’Reily on the TV series Oz. Simultaneously, he starred on Law & Order: Special Victims Unit as Brian Cassidy. He next gained mainstream prominence for starring as Johnny Gavin on Rescue Me. Since then, he’s had notable performances on the TV shows 30 Rock, Terminator: The Sarah Connor Chronicles, and Life on Mars. He’s also recently starred on the short-lived comedy-drama series Battle Creek. His latest work on the big screen was in 2016’s Teenage Mutant Ninja Turtles: Out of the Shadows.