Oh that Pensieve... is there anything it can't do? Other than stop Lord Voldemort (Ralph Fiennes) of course. Here we see Harry (Daniel Radcliffe) take a stroll down Albus Dumbledore's (Michael Gambon) memory lane, getting a glimpse of the Hogwarts headmaster's first encounter with a young Tom Riddle (Hero Fiennes-Tiffin). You know, the guy who one day becomes He-Who-Shall-Not-Be-Named. He gives Harry that forehead scar. Tall dude, hairless, usually surrounded by black-robed lackeys. Ringing any bells?
You know, I think Rupert Grint has the right idea in the clip's intro. This is an exclusive sneak peak at "Harry Potter and the Half-Blood Prince." You just saw it premiere at the 2009 MTV Movie Awards. Now peep it here and then share your thoughts in the comments section below!