"The Angels were there from the very first moment we arrived in New York," he says, knowing that to be true now that he has the benefit of distance to help him understand precisely that. "Even if we did find the door, even if I did have another way, they would be there to stop me. They want, so badly, to feed off that energy. Who wouldn't?" he replies, pointing at Peter as he paces. "After all, two time travellers sent back to the mid-thirties. Feeding off that, even for a brief moment, would be a meal for a lifetime."

And he hopes, truly, that they choke on it.