Harry Potter and the Deathly Hallows: Chapters 29-33
The Battle of Hogwarts
The battle is joined between the students and faculty of Hogwarts on one side and the Death Eaters with their various horrible allies on the other. In the middle of it, Harry learns even more dark secrets about his past. He just can't get enough dark secrets.
Note: there appears to be a cat meowing in the background of this episode. It's just an mp3 artifact.