Chapter 25 - "The Egg and the Eye" - In which Harry works on solving the secret of the egg in the Prefects' bathroom, is helped by Moaning Myrtle, sees Crouch on the Marauder's Map, gets stuck in the stairs, barely escapes being caught by Snape, and the fake Moody borrows Harry's map.
Back in classes, Harry, Ron, and Hermione discover Hagrid gone, and [Professor Grubbly-Plank] teaching [Care of Magical Creatures] in his place. They soon discover why when Malfoy shows them a [Daily Prophet} article, written by Rita Skeeter, that exposes Hagrid as a part-giant.
Hogsmeade and Rita Skeeter
Despite Hermione's insistence that he should be working on his clue for the [second task], Harry resolves to go to [Hogsmeade] with his classmates. On the way, they pass [Krum] swimming in the lake, wondering what on earth he's doing.
In the [Three Broomsticks] there's no sign of Hagrid, though Ludo Bagman does offer to help Harry with the upcoming [second task]. Bagman than skips off, clearly avoiding Fred and George, not to mention a crowd of goblins that seem to be following him. Rita Skeeter walks in next, and Hermione shows her up and storms off.
Running back from [Hogsmeade], Hermione leads Ron and Harry to Hagrid's doorstep, where they all but bang down his door. Surprisingly [Dumbledore] answers the door, and he and the trio convince Hagrid to return to work instead.
Harry sneaks into the [prefects' bathroom] late at night to try to solve his egg clue about the [second task]. There, with a little hope from Moaning Myrtle, he figures out that he'll have to swim underwater for an hour to rescue something from the merpeople in the lake.
On his way back from the [prefects' bathroom], Harry spots something strange on the [Marauder's Map] - [Barty Crouch], in [Snape's office]. Running under his [invisibility cloak] to look, though, he instead gets stuck on the stairs and drops his egg. Filch and Snape soon come running, but are diverted by Moody, who quickly diverts them and gets Harry out of his jam.