During the summer, a group of Dementors appear to attack Harry and Dudley. Harry uses the Patronus Charm to save his and Dudley's lives, then Mrs. Figg, their neighbor, takes them home. Later, Harry receives a letter informing him that he is now expelled from Hogwarts. Many days later, some wizards and witches arrive to rescue Harry. He is taken to court, where his hearing will take place. The judge is the Minister of Magic, and a woman named Dolores Umbridge, the Senior Undersecretary, is part of the jury. Clear of all charges, Harry moves on with his fifth year at Hogwarts. The Senior Undersecretary is the new Defense Against the Dark Arts teacher.