German director Moritz Mohr has a spectacular feature film debut with Boy Kills World. The insanely violent actioner takes place in a dystopian city, suffering under the tyrannical rule of the murderous van der Koy family (Famke Janssen, Michelle Dockery, Brett Gelman, and Sharlto Copley). A shredded Bill Skarsgrd stars as the deaf and mute Boy. He swears vengeance against the van der Koys after his beloved mother and sister are slaughtered on “Culling Day.”