The Plot: Hormones are racing among the students of Hogwarts thanks to a powerful love potion from Potions Professor Horace Slughorn's (Jim Broadbent) class. Harry, Ron and Hermione are not immune, grappling with growing jealousy as they prepare to battle the evil Voldemort, who is tightening his grip on both the Muggle and wizarding worlds. While Ron finds himself the center of attention due to his Quidditch prowess, Harry excels in class with the help of a potions textbook previously owned by the mysterious "Half-Blood Prince." Meanwhile, Voldemort has sent Harry's student nemesis, Draco Malfoy, to assassinate Dumbledore, and at the critical moment, he fails. Professor Snape steps in to do the job, revealing to Harry that he is actually the Half-Blood Prince. With Dumbledore dead, Harry, Ron and Hermione vow to find the rest of Voldemort's seven Horcruxes (items that grant immortality to its owner's soul) in order to destroy them and defeat the dark lord.
The Highlights: Harry sees Dumbledore recruit a young Tom Riddle/Voldemort using the wizard's memory vials; Ron becomes a Hogwarts celebrity and chick-magnet after proving his prowess as a Quidditch keeper (mistakenly thinking he's swallowed Harry's good luck tonic); Harry and Ginny Weasley's first kiss is thwarted by an attack by Bellatrix Lestrange; Ron consumes a love potion intended for Harry and swoons at the moon; Harry and Ginny finally kiss in the Room of Requirement.