The Monkey’s ending involves a whole lot of death. The Monkey, written and directed by Longlegs filmmaker Osgood Perkins, sees Hal and Bill — played by Theo James as an adult and Christian Convery as the younger versions — at odds with each other for the majority of the film. They each have a relationship with the monkey and have both asked it to kill someone on their behalf. Of course, that doesn’t work out, but Bill tries anyway.