It's such a stark reminder that some of them missing people, whole pieces carved out of themselves and left behind in a place where they can't go, a world they can't retrieve. Dave. Claire.

Luther hasn't often thought of himself as lucky, but he does now. All of his family is here. The only people he loves are here.

There's an unreadable expression flickering across his face, as he puts those pieces together. "So you can't summon him," he says.