In this part Harry’s aunt comes to visit. But did Albus Dumbledore tell Hogwarts students not to loose their temper,no. But Harry did. He blew up his aunt. Harry runs away to Diagon alley. Then boards the train to Hogwarts school of witchcraft and wizardry. But a mass murderer Sirius black had escaped from the wizard prison Azkaban. Being the first one to do so  he is coming after Harry. On then train Harry comes face to face with a dementor which causes Harry to faint. Prof. R.j. Lupin repealed the dementor. You want to hear more listen to this podcast.