Teen Wolf: Season 2, Episode 11

2 - 11: Battlefield

Boyd and Erica leave Derek, terrified of the Argent werewolf genocide. At the championship lacrosse game, Gerard threatens to murder someone with the Kanima if Scott does not bring Derek to him by the game's end. Allison ruthlessly shoots Boyd with arrows until the werewolves are saved by Chris, who is upset by Allison's actions. On the field, Stiles begins a massive winning streak, and their team wins. Just then, Jackson is found bleeding and unresponsive; he has stabbed himself with his own claws. Sheriff Stilinski makes a grim discovery: Stiles has gone missing.