Ch. 438"De Vermis Mysteriis"
Jerry, Shirley, and the villagers captured a previously unknown shape-shifting Doppelganger, while magical incidents and social unrest continued to spread. In August, Ted detected a mysterious surge at Goblin Lake and used flashback to reveal a boy had been there shortly before it faded.
- Jerry deduced that the impostor posing as Douglas could transform, read surface thoughts, and had grown overconfident, so he baited it while Shirley knocked it out.
- The village chief bound the Doppelganger with magical chains, and the Ministry of Magic identified it as a newly discovered creature that had been hiding among Muggles for months.
- Ted observed rising unrest and mysterious incidents as the Queen discussed revealing wizards to the public with Lupin, but the magical authorities could not agree to change the Statute of Secrecy.
- Ted discovered the dangerous grimoire De Vermis Mysteriis but declined to exchange experience for it.
- Ted's Magic Network detected abnormal magical fluctuations at Goblin Lake, and his flashback spell revealed a boy of about ten had been there before they subsided.