Harry Potter and the Prisoner of Azkaban At the beginning of Harry Potter and the Prisoner of Azkaban (1999), Dumbledore is forced to accept the presence of Dementors at Hogwarts. The Dementors have been sent to protect the students from Sirius Black, a supposed murderer who escaped from the wizard prison Azkaban. When Black breaches Hogwarts, Dumbledore closes every entrance to the school and grounds. After the Dementors cause Harry to fall off his broom during a Quidditch match, Dumbledore becomes angry and uses his wand to help Harry return safely to the ground. Later, Dumbledore suggests that Hermione use her Time-Turner to save Black and Buckbeak the hippogriff from execution.
Harry Potter and the Prisoner of Azkaban At the beginning of Harry Potter and the Prisoner of Azkaban (1999), Dumbledore is forced to accept the presence of Dementors at Hogwarts. The Dementors have been sent to protect the students from Sirius Black a supposed murderer who escaped from the wizard prison Azkaban. When Black breaches Hogwarts, Dumbledore closes every entrance to the school and grounds. After the Dementors cause Harry to fall off his broom during a Quidditch match, Dumbledore becomes angry and uses his wand to help Harry return safely to the ground. Later, Dumbledore suggests that Hermione use her Time-Turner to save Black and Buckbeak the hippogriff from execution.