Derek can hear the other two alphas on the far side of the door, even if their scent is somewhat lost in the stink of them and the other three all over the house, even moreso in the stench of Stiles' blood and pain and fear. But he knows they're down there, with Stiles, and the fact that they're waiting for him, using Stiles as bait, doesn't matter nearly as much as the fact that he needs to get him away from them. Now. He's lost too much already, failed too many times, and he's not going to fail the one person left who might still trust him, at least a little.

With another heave he manages to rip completely through the door frame, claws scrabbling at the hinges on one side and the bolt on the other until they rip free as well. He pauses then, just for a moment, to try and pinpoint Stiles' heartbeat so that he knows exactly where he's going when he moves. He's surprised to realize that Stiles' heart rate is slowing, steadying.

"Last chance," he snarls, rather than just throwing the door down the stairs and following it. "If you let him loose to walk out of here I'll consider not killing you." Though with the history of the Alpha Pack he's not sure that's an ethically defensible position if he has it in his power to destroy the last of them.