Harry Potter and the Half-Blood Prince is a landmark film in the series with many scenes that evoke emotion and conflict within the world of Harry Potter. The film was already an edgy, suspenseful, and terrific entry in the franchise and becomes that much better with the Ultimate Edition treatment.
Harry Potter and the Half-Blood Prince begins in a much different way than all the other films. Harry Potter (Daniel Radcliffe) is recovering from the shock of seeing his surrogate father Sirius Black (Gary Oldman) get killed and is forced to grow up in ways he never expected. For the first time we do not need to deal with the Dursleys as the film starts with Harry alone in a diner flirting with a waitress. As he eats he sees Dumbledore (Michael Gambon) staring at him from across the way. Going across to see him Dumbledore informs Harry that he needs his help and, with a wistful look at the waitress who seemed to show interest, Dumbledore and Harry Apparate away.
Dumbledore brings Harry to see a colleague named Horace Slughorn (Jim Bradbent) who has vital information needed to defeat Lord Voldemort (Ralph Fiennes). Using Slughorn’s curiosity and propensity for wanting to gather together prominent students, Harry and Dumbledore convince him to teach at Hogwarts. This is part of Dumbledore’s master plan to find a way to defeat Voldemort; the key is a memory of Slughorn’s that was altered. If Harry can get the memory by befriending Slughorn then Dumbledore can solidify his plan.
Over the course of the film Harry reunites with his friends Ron Wesley (Rupert Grint) and Hermione Granger (Emma Watson). Harry also notices that Ron’s sister Ginny (Bonnie Wright) is growing up fast, and there is an undeniable chemistry between them. Heading back to school the students are surprised to hear that Professor Snape (Alan Rickman) has finally been given the Defense against the Dark Arts teaching post leaving room for Slughorn to teach the Potions class. When Harry joins the class (late) he is forced to use a threadbare Potions textbook that no one wanted. It turns out that this textbook was used by an extremely talented student who called himself "the Half-Blood Prince." Using the notes written in the book Harry excels in Potions class (much to Hermione’s dismay) and even learns a few darker spells and tactics from it.