Parrish has been subconsciously stealing the bodies of the failed Chimeras and taking them to the ancient stump.

While the pack falls apart, the continue their experiments, and things are looking grim for the Chimeras.

💡 Theo has successfully isolated the True Alpha. By dismantling Scott’s support system—Stiles, Liam, and Malia—he is clearing the path for his own pack. Are you Team Scott or Team Stiles after that rain scene? Teen Wolf S5E9 - Lies of Omission - Recap/Review/Reaction

In a controversial move, Scott denies Liam’s plea to bite Hayden to save her life. He’s afraid the bite will kill her since she is already a "failed experiment". Parrish and the Nemeton Lydia and Parrish finally track down the Nemeton .