Split, Directed By Night Shyamalan

Split is a 2016 American Psychological horror-thriller film that was written and directed by Night Shyamalan starting James McAvoy, Anya Taylor-Joy, and Betty Buckley. The film follows a man with 23 different personalities who kidnaps and imprisons three teenage girls in an isolated underground facility. One of his darker personalities manifests within his psyche and results in his eventual transformation into a merciless and cannibalistic sociopath with superhuman abilities and an insatiable hunger for human flesh.
The three teenagers that were kidnaped are Claire, Marcia and Casey who is an emotionally reserved teenager, due to been molested as a child by her uncle John, who became her legal guardian after her father's death. They were kidnapped by Kevin Wendell Crumb, a man suffering from dissociative identity disorder. Kevin was evaluated by psychologist Dr. Karen Fletcher, who discovered that he formed multiple personalities as a means to cope
with the abuse he suffered at the hands of his mother. While Kevin appears otherwise stable, Dr. Fletcher has identified 23 distinct personalities within Kevin; in his mind, these personalities sit in chairs in a room, waiting for their turn "in the light" by controlling Kevin's body dominant personality.
Kevin takes the girls to his underground quarters and secures them in a small room. They recognize his dissociative disorder, and Claire attempts to use this against Kevin to escape but is caught by "Dennis" and segregated from the others. Over several days, Kevin leaves them locked up while he goes off to work and attends appointments with Dr. Fletcher. During these meetings, Dr. Fletcher recognizes that "Dennis" has seemingly taken over the dominant personality from "Barry", though he tries to act as "Barry" to fool her. She recalls an incident that "Barry" told her about a month before, where two teenage girls had walked up to him, taken his hands and placed them on their breasts, which may have triggered "Dennis" to take over. Dr. Fletcher suspects that Kevin, as "Dennis", is responsible for the three missing teenagers. She has also found that Kevin's physiology changes when a new personality comes into the light. Recently, "Barry" has refused to allow "Dennis" or "Patricia" their turns, in part due to Dennis' tendencies towards bothering underage girls and Patricia's undesirable traits, and also because both appear to worship
Casey tiers to befriend "Hedwig", one of the personalities in Kevin mind. Hedwig is a young boy that is in control but is not revealed until the end. Casey is able to get "Hedwig" to let her out of her room to see his bedroom, thinking that there may be a means of escape through "Hedwig's" window. She finds that it is only a drawing of a window that he was talking about. So she is able to convince "Hedwig" that she is like him and gets him to reveal a walkie-talkie that he says he stole from Patricia. Casey uses it to call for help, and the person at the other end doesn't believe her, thinking that someone is playing a joke. Before she can convince the person that she is serious, "Patricia" takes over Kevin's body and soothes Casey.
Dr. Fletcher shows up at Kevin's home, where he reveals that "The Beast" is real and that he going to meet him. Suspicious of "Dennis", Dr. Fletcher pretends that she needs to use the bathroom and goes looking around his home. She finds Claire in her cell, but before she can do anything, "Dennis" catches her. He sprays her with a sedative in her face then secures her in a separate room. He then leaves to go met with “The Beast" which is another personality that takes over for the first time, giving Kevin super-human abilities. Back at his house Claire and Marcia attempt to escape from their cells. Dr. Fletcher regains consciousness long enough to write out Kevin's full name on a piece of paper before "The Beast" returns and kills her. Casey escapes from her cell, only to find that "The Beast" has already attacked and eaten Marcia and watches in horror as he does the same to Claire.
As Casey tries to escape she finds Dr.
Fletcher's body and her note on the piece of paper. "The Beast" approaches her, but she calls out Kevin's full name, bringing Kevin forth. Upon learning of the situation and realizing that he hasn't been in control of his body for two years, Kevin instructs Casey to kill him with his shotgun. Following this statement, all 24 personalities begin warring for control of "the light", but shortly thereafter "The Beast" personality takes hold again. Casey escapes from his quarters into an underground tunnel and shoots him twice, but the shells have little effect. She locks herself in a small caged area. "The Beast" finds her and is about to pull the bars open to attack her but sees faded scars across her body, a sign of her past emotional turmoil and self-harm. Having previously declared his plans to rid the world of the "untouched", those whose hearts are impure because they have never suffered in their lives, he considers Casey to be "pure" and spares her, disappearing from the
tunnels.
Dr. Fletcher reveals that Kevin has dissociative disorder. This can be defined as disruptions in aspects of consciousness, identity, memory, physical actions and/or the environment. When a person experiences severe dissociation symptoms, they may be diagnosed with a dissociative disorder. The signs and symptoms of dissociation can vary depending on the type of dissociative disorder they experience. Dissociation symptoms become severe and can disrupt daily life.
The causes of dissociation typically include trauma, often prolonged trauma, such as sexual or physical abuse, in childhood. Dissociation is more common in children, which is why this particular behavior is often developed in childhood. Dissociation is a coping skill used to separate the person from the traumatic events and memories of the traumatic events. Dissociation may be get worse during times of stress, even in adulthood. There are some treatments but the primary treatment for dissociation involves psychotherapy which is known as "talk" therapy. After the new coping techniques are learned and become effective, the initial trauma that caused the start of the dissociation symptoms can be discussed in an attempt to deal with the issue it and move past it. There are signs of dissociation symptoms which are mental health problems such as depression, anxiety and suicidal thoughts, sense of detachment from oneself, seeing one's life as if it is a movie, an unclear sense of identity problems in relationships, work or other important areas of their life, a presence of multiple personalities talking or living in your head, or a feeling of possession by another identity. We also need to that signs and symptoms of dissociation can happen at any time and can last for years.
The movie Split gathered controversy for its alleged stigmatization of mental illness. The Australian mental health charity SANE stated, "Films like this are going to reinforce a false stereotypical notion that people living with complex mental illnesses are inherently dangerous and violent." The International Society for the Study of Trauma and Dissociation issued a statement debunking the stereotype of dangerous dissociative identity disorder (DID) patients, and criticizing how the film was made "at the expense of a vulnerable population that struggles to be recognized and receive the effective treatment that they deserve." Some with dissociative identity disorder spoke out against the film and it’s marketing for the representation of multiple personalities as frightening and/or violent, including in an open letter to the director.

Split was released on Digital HD on April 4, 2017, and Blu-ray, DVD and On-Demand on April 18, 2017, from Universal Pictures Home Entertainment.