[Scott may not know Castiel's face, but Castiel knows Scott's. They had only interacted one time, when Scott had stepped in to save Allison from a crazed version of Isaac, the one from the future. He'd thought Allison a trick, an illusion, as the version of her from the future had been long dead.

That had been some time ago, and Castiel had felt the werewolf leave this place and then return, so he isn't surprised when there's no recognition along with the questions.]

... Like the Apocalypse, yes. Though this is only a remnant from my home. [Castiel doesn't expect the End of Days to start taking place here.] There isn't a way to stop them. All you can do is put yourself in a situation where you'll be unable to hurt anyone.

[If Scott's craving are anything like Isaac's, then he may need to do exactly that.] Do you need assistance?