His primary care physician, Dr. Lester Sheehan, who masqueraded as Chuck, his “partner,” had helped engineer a live action role play scenario, where he was investigating a case crafted from the details of his wife’s murder of their three children.
At the end of Shutter Island, Leonardo DiCaprio’s U.S. Marshall Edward “Teddy” Daniels makes his way to the fabled lighthouse on the titular island.
After a twisting narrative that saw Daniels pursue a path of paranoia, deception, and a fabled missing patient, he was met with the truth: he’s a patient himself, with the real name of Andrew Laeddis.
This strategy has played out before, and he is informed that if this experimental therapy doesn’t work this time around, he’ll be suggested as a candidate for a lobotomy.