On Teen Wolf Season 6 Episode 11, Scott, Lydia, and Malia are preparing to leave Beacon Hills for their first semester of college. This means making sure that their loved ones are protected. Scott makes sure his mom can protect herself, and Lydia offers her mom a list of all the supernatural beings in Beacon Hills.
For Mason, Corey, and Liam, it's their senior year. They meet with a very pushy guidance counselor to go over their schedules. During their meetings, the counselor seems to know a lot about all the mysterious and supernatural things that have occurred in Beacon Hills.
During lacrosse practice, a bloody wolf walks onto the field. When Scott and Liam follow it off the field, they find it dead, along with a lot of other wolves. Then, at school, rats run rampant. When Liam and Mason take Malia into the sewers, they found a bunch of dead rats, and Malia says they reek of fear.
As if that isn't enough, the oldest patient in Eichen escapes. He's been there since the beginning, and he's a hellhound. The reason he's out now is because something escaped when the pack opened the portal to another world. Before he can share what escaped, the pushy guidance counselor kills him with a silver bullet with Argent's mark on it.
Stiles, on the other hand, is at Quantico. He's ready to start his life far away from Beacon Hills, but as the instructor plays footage of active FBI cases, there's Derek Hale, running shirtless through the woods, as he does. It turns out, Derek is wanted for mass murder.