A wizard goes back to his childhood home and sets off a long forgotten alarm at the Ministry. Sent to a secure ward in St Mungos against Harry's orders, he claims an acquaintance with Harry that is simply impossible. Unable to dismiss the man as confused and delusional, Harry will be compelled to follow him through the Realm of Bridges and back into wartime London.
“I don’t know what they gave me but you should get some for the Christmas punch, Haarree.”
Harry interviews David again but he as been given a strong sedative. Harry and Anderton interview Kathryne Davenport but her husband returns early. Harry returns to the tiny terraced house and recalls when he first met David.
Harry goes to Hogwarts. Stopping by Hagrid's house, he helps a second year student with his wand. Professor McGonagall confirms more truths told by Royce. Returning to London, Harry learns David has received another visitor.
Hartford has vanished again so Harry tries to move everyone to safety as the time bubble expires leaving them stranded. Eudoxius Brightwood introduces himself and apologies for what he intends to do. Harry gets Ron talking and he confirms some of what he did and why.
They steal a double decker bus and head for the park where they hope to get home via the Old Khan's camp. As they drive out of the garage and speed along Tramway Avenue, two young boys jump aboard and run upstairs.
Part Two. Harry wakes to find himself trapped in a strange house that is somehow still familiar despite his being unable to remember anything. Harry searches the house looking for any clue about himself and especially the girl.
Hartford receives treatment but will need a few days to recover. Harry witnesses the birth of a new regime while Herry obsessively searches for a cure to the magic draining curse that blighted his world. Both Harrys are shocked to meet a relative of theirs.
The time for their departure has arrived and Harry says goodbye to his new friends knowing he will never meet them again. Brightwood gives Harry a gift box intended for young Christopher. Back at Hogwarts, Harry takes a moment to give his counterpart some advice.