I don't know. Maybe he can only bring people in and fix them while they're here, but he can't control when they vanish. There must be some force here that's higher than him. [It was all just speculation, and it didn't change the fact that Costigan was gone, and either one of them might be gone by tomorrow morning. He couldn't even remember what the last thing he'd said to Costigan was, had nothing to remember him by. He'd lost plenty of friends in the line of duty, and it hurt every time.]

It... kind of makes you realize you need to appreciate what you have when you have it.