shyamalan continued to work on other films, releasing "split" in 2017. kevin wendell crumb, played by james mcavoy, is a man suffering from dissociative identity disorder, that affects his body chemistry to such an extent that he adopts the mannerisms of each separate persona. one of these personalities is "the beast", which drives crumb's body into a feral superhuman state, guided by the desire to consume those who have not had a traumatic situation in their lives – those it does not consider "broken". crumb had initially been written into the script for "unbreakable", but shyamalan felt there were balancing issues with his inclusion and removed him from the story. "split" was effectively rewritten from some of the scenes he had planned for crumb and expanded out into a standalone picture.