Seamus Dever is an American actor. His Hollywood career became first active in the early 2000s. During this time, he guest starred on the TV shows Undressed, Crossing Jordan, and Without a Trace. She’s also appeared on the TV movies She’s No Angel and Mystery Woman: Snapshot. He’s also had roles in the films Outside the Law and Hollywoodland. His first significant role on the small screen was as Dr. Ian Devlin on General Hospital. He next played recurring role on Dr. Chris Ferlinghetti on Army Wives. From 2009 to 2016, he starred as Detective Kevin Ryan on Castle.