Cowboy Pete hangs out for a spell with "Harry Potter and the Half-Baked Prince"

Half-Blood, half-baked, whatever.  Discussion with mild spoilers (oh, right, like you don't know every beat already) follows:

The latest entry in the Harry Potter film series presupposes that you've either read the books, seen the previous films or--more than likely--both.  It hits the ground running and just assumes that you'll catch ...