S02E12: Master Plan

Scott races to uncover Gerard's master plan following a shocking death on the lacrosse field. Derek plots to take Gerard down using his own methods. Erica and Boyd are captured as Allison continues her merciless bloodthirsty revenge on the werewolves for her mother's suicide. Meanwhile, Scott, Stiles, Lydia, Melissa and Isaac are all under pressure amidst the chaotic events.