DESCRIPTION: Missing criminals. A remote island. Trench coats. These are the makings of a great mystery film. In Shutter Island, U.S. Marshal Teddy Daniels (Leonardo DiCaprio) investigates the disappearance of murderers at a hospital for the criminally insane. His investigation leads him to the remote Peddocks Island in Hull, Massachusetts. One of the largest islands in the Boston Harbor, the Islands served as a harbor defense fort until the end of WWII. Scroll down to see more film locations identifed from Shutter Island.