With Voldemort's minions on the march, Harry returns to Hogwarts for year six and a dangerous mission with Dumbledore, one involving new potions professor Horace Slughorn and long-hidden secrets in the dark lord's past. Will the secrets--and a book that once belonged to the mysterious Half-Blood Prince--be enough, though, to help save someone close to Harry from being killed? Daniel Radcliffe, Michael Gambon, Jim Broadbent, Rupert Grint, Emma Watson star. 153 min. Widescreen; Soundtrack: English. Two-disc set.