Desmond Harrington is an American actor whose career started in the 1999 film The Messenger: The Story of Joan of Arc. In the 2000s, he had roles in the movies Riding in Cars with Boys, The Hole, My First Mister, Ghost Ship, We Were Soldiers, and Wrong Turn, among others. On television, he starred as Det. Jimmy McCarron in Dragnet, Wylie Blake in Sons & Daughters, and Troy and Rescue Me. His most prominent role was as Det. Joseph Quinn in the Showtime series Dexter, which he played from 2008-2013. At the same time, he played a recurring role as Jack Bass in Gossip Girl. Following this, he played Alan Shepard in The Astronaut Wives Club. He then played Joe in Sneaky Pete and currently stars as Michael in the CBS series Elementary.