John looked at Sherlock and then let out a breath. "Gawain, Gallahad, Geraint, and Gaheris..." He moved his hand, letting the magic fall around each of them. He knew Greg already remembered who he was. But it was easier to do four than three.

He moved to sit in a chair, looking at the four. "You four are Knights of the Round Table, from the ancient Kingdom of Camelot, loyal to King Arthur. There is a threat to London, to all of England coming. You are awakening, being called upon by England herself."