'Teen Wolf' Cliffhanger: Just How Much Havoc Will Theo's New Pack Wreak?

He just brought a bunch of chimeras back to life, and that makes us really, really nervous.

We knew from the get-go that Theo was after a new "Teen Wolf" pack, but we didn't know he would stop at nothing until he got it -- even if it means behaving like a bona fide crazy person.

Actually, scratch that. We knew straight from episode 2 that the newbie was bad news — REMEMBER THIS? Nevertheless, the end of tonight's Season 5 summer finale left us reeling. Did the BHHS transplant really just revive a bunch of dead chimeras, forming his own deadly pack of supernaturals? (The answer is yes. Yes, he did. And Parrish is probably gonna be piiiiissed.)

Theo admitted that he was the Dread Doctors' first successful chimera, and it seems he came to turn Scott & Co. against each other and watch them slowly tear each other apart. "I never lied about why I came to Beacon Hills," he told Stiles. "I’m here for a pack. I came for the Werecoyote. The one whose first instinct is to kill. I came for the Banshee, the girl surrounded by death. I came for the Dark Kitsune, for the Beta with anger issues, and I came for Void Stiles. That’s the pack I want. Unfortunately, it doesn’t include Scott."

And now the evil homeboy's got a new group of unpredictable science experiments, and we'd like to know what this means for Beacon Hills and our "Teen Wolf" friends. We assume Lydia winds up at Eichen House after being found comatose in the woods. But what about Scott (who's actually ALIVE, thank God!)? And Stiles? And Malia? Liam? Will Kira return? The good news is... Hayden's not dead -- even if Theo is using her to perform his dirty bidding, whatever that may be.

Any ideas? Comment with your theories, and be sure to stay with MTV News for more updates on the return of "Teen Wolf"!