"We'll just have to make sure he can't," Marcus answers. No matter who or what is inside Nick right now, there is no way in hell he's letting it do anything to hurt Sabrina. He's willing to help, to get Sam involved, to take every possible step he can to save Nick, but when it comes down to it, if there's a choice between saving Nick and saving Sabrina, there's no questions in Marcus's mind what he'll do.

This is why Father Sean tried so hard to keep him from caring for anyone. Now that he does, he can no longer make objective decisions. Marcus's calling, his entire life has been dedicated to saving everyone, regardless of who they are. But he loves Sabrina too much to be objective right now.

"Besides getting in touch with Sam, do you have any idea what we ought to do next?" he asks. He has ideas, but he knows they come from different worlds and what he would do might not be what's best for the situation.