Teen Wolf (2011)

S2E2 Shape Shifted

Isaac's father is killed, prompting Scott, Stiles, and Derek to devise a plan for an escape. Meanwhile, the Argent family takes action to oust the principal, replacing him with Allison's grandfather. As tensions rise, Scott detects the presence of another werewolf lurking in the lacrosse locker room and decides to track them down using his keen sense of smell.