Harry discovers that Stan Shunpike, a trustworthy bus driver and friend, has been arrested by the Ministry of Magic for being a Death Eater. Harry refuses to believe that Stan could be working for Voldemort.
Harry holds Quidditch tryouts and realizes right away how hard it is to be a leader.
Katie Bell, Demelza Robins, and Ginny Weasley all make the team.
Cormac McLaggen, a brawny seventh year, goes toe to toe with Ron Weasley for the Keeper position on the team, but Ron wins out in the end, saving more goals.
McLaggen is furious and nearly takes Harry out.
Harry did notice something funny about McLaggen's performance – it was almost as if he had been Confounded.
Harry realizes that Hermione used a Confundus charm on McLaggen in order to ensure that Ron would become Keeper.
Harry, Ron, and Hermione visit Hagrid who is very cold and hurt at first, knowing that each one of them has dropped his class this year.
Soon, things warm up between the four, and Hagrid returns to his more normal self.
What's really been bothering Hagrid is that his long-time friend Aragog, a giant spider who lives in the forest, is dying.
Later on, Harry asks Hermione about the Confundus charm and why she intervened with the tryouts. Hermione is defensive, arguing that Harry wouldn't have wanted the hot-tempered McLaggen on the team anyway.
Harry receives an invitation to a party Slughorn is throwing, but he is saved by the fact that he has to go to detention with Snapey-Snape.