Teen Wolf: Season 3, Episode 11

3 - 11: Alpha Pact

After escaping the Alphas, Derek and Peter try to find a way to save Cora, while Allison, Isaac, and Stiles discover that Jennifer has named Chris Argent as her last sacrifice. Sacrificing himself to save Allison, Chris hands himself over to Jennifer. The group discover that Jennifer is holding her victims in the root cellar. Scott and the Alpha pack hunt down Ms. Morrell; Deucalion injures her with the blade in his cane. Peter tells Derek that as an Alpha, he can heal one of his own, even at the brink of death. Choosing family over power, Derek heals Cora, losing his Alpha powers in the process. Stiles and Deaton find Scott and convince him that they need to be 'temporarily' dead in order to find out where their parents are. Scott, Allison, and Stiles are then put into tubs of ice and pushed down.