The trailer for Shutter Island establishes a sense of mystery through quick flashes of locations and characters. Clues are provided, like a piece of paper reading "who is 67?", that get viewers engaged in solving the film's mystery. Shots of Leonardo DiCaprio's character are close-ups that show his reactions and give a sense of him feeling trapped. Key objects are also closely filmed to focus attention on important story details and clues. The music and editing help build an unsettling atmosphere that leaves viewers wanting to learn more.