Back in the house, David finds that, although he has been in his study many times, the boxes were actually never unpacked after the move. He realizes that he has dissociative identity disorder and Charlie is not imaginary at all: "Charlie" is David himself. Whenever "Charlie" would emerge, David would be in his study. He also finally recalls the New Year's Eve party the night before his wife's death. He had caught Alison making out with another guest. "Charlie" was created as a way to express David's rage so that he could murder his wife, something the docile David was too decent to do. Emily knew the entire time about her father's split personality but did not tell him because she was unsure which personality murdered her mother until "Charlie" killed Elizabeth. Once David realizes the truth, he becomes completely consumed by Charlie, leading him to murder the local sheriff, who arrives to investigate the neighbor. Emily calls Katherine for help, tricks Charlie, and escapes into the cave where she originally met Charlie. Katherine takes the gun from the dead sheriff and finds Charlie in the cave. He pretends to be David and attacks Katherine. Katherine begs for David to fight his murderous other personality. Charlie says David no longer exists. Emily emerges, begging Charlie to let Katherine go. Her distraction allows Katherine to shoot Charlie, killing him at last. Later, Emily is preparing for school in her new life with Katherine. But Emily's drawing of herself with two heads suggests that she might also have dissociative identity disorder. Endings This film has a total of five different endings, The US theatrical version had the following ending: Preparing for school while living a new life with Katherine, Emily draws a picture of herself and Katherine, looking happy. But when the camera cuts back to Emily's drawing, Emily has two heads suggesting she now has dissociative identity disorder. This ending is included as an alternate ending on DVDs featuring the International theatrical ending. Another four were included on the DVD: Happy Drawing: The same as the ending in the US theatrical version, except that the drawing Emily makes of herself has only one head, suggesting that she does not have dissociative identity disorder. One Final Game: Emily is shown seemingly in a new apartment bedroom, and Katherine's actions mirror that of her mother's at the beginning of the film. She reassures