The trio talks about the attack on the Quidditch World Cup while riding on the train and Harry sends off a message to Sirius.
The Hogwarts Express drives path a lake on the way to Hogwarts.
Sirius talks with Harry about Dementors and he agrees to teach him how to defend himself. Later, the trio talks with Hagrid about the hearing about Buckbeak's hearing.
Ron and Harry in their flying car pull away from the Hogwarts Express as it travels past a later.