Part of Jack wants to protest, that he'll be fine and that Ianto shouldn't endanger himself by trying this, but at the same time. Another part of him doesn't care. This is going to hurt, and even just the knowledge that Ianto's right there, holding his hand, will help.

So he holds out a hand for Ianto to grab, before turning to Castiel. "I'm ready," he says. "Tell me what you need me to do."