Scott tries to rescue Lydia from Eichen house.
Deaton finds new information about the Dread Doctors while Scott and Malia come up with a plan to help their friends.
Scott and his friends follow Dr. Valack's advice; and experience strange effects as a result.
The pack enters Eichen House in order to learn more about the Dread Doctors.
Stiles tracks a fugitive; and Liam plays wingman for Mason at a nightclub.
Scott tracks a new shapeshifter that's threatening Stilinski; and Malia receives information about her mother.
Scott and Stiles look to help out Kate against the pack.