Factual error: Two characters discuss a recording of Mahler's quartet for piano and strings in a minor. The manuscript for this adolescent piece was discovered by his widow, Alma, in the 1960s. Difficult to accept that there was a recording available in 1954 when the movie was set.
Shutter Island (2010)
41 mistakes - chronological order
Dr. John Cawley: We don't know how she got out of her room. It's as if she evaporated, straight through the walls.
Trivia: During the ferry approach at the start, we are shown Shutter Island. In actuality this is a combination of Peddocks Island (the decaying brick buildings), Maine's Acadia National Park, Massachusetts' Medfield State Hospital, and Turner Hill Country Club's Rice Estate (located in Ipswich, MA), which were combined via CGI. Additionally, the mountainous region of the island (shown as the ferry approaches) was also CGI, and added in post-production.
Question: Why does Teddy have a cut with a plaster (band-aid) on his forehead throughout the film?
Answer: He was in an altercation with the patient in ward C prior to returning to ward C and talking with him again. It was an injury sustained in the past due to that.
Answer: The bandage is a symbol indicating when and when not Teddy is caught in his delusions. When the bandage is on he is delusional, thinking he is the marshal finding out all the dark secrets of the facility. When the bandage is absent he is lucid and aware of his past crimes and his own delusions.
Wrong. It's on the whole movie until he takes a shower. The bandaid is off but yet that's the scene where he runs in the lighthouse thinking he's the Marshall still. Did you watch the movie at all?