Nickelodeon HD Harry Potter's third year at Hogwarts starts off badly when he learns deranged killer Sirius Black has escaped from Azkaban prison and is bent on murdering the teenage wizard. While Hermione's cat torments Ron's sickly rat, causing a rift among the trio, a swarm of nasty Dementors is sent to protect the school from Black. A mysterious new teacher helps Harry learn to defend himself, but what is hi 2026-10-22 During Harry's fourth year at Hogwarts a competition will be held between three schools of wizardry, and contestants will be magically chosen for the very dangerous event. 2026-10-22