Saw IV
The plot and puzzles seem to be getting more contrived and confusing as each film goes by. Still, for Hallowe'en, with a big bag of munchies and a beer it was thoroughly enjoyable stuff.
What this one did do was give a back story to the Jigsaw but, by the same token, opened up a new branch of characters for what looks like becoming an annual event - V is in cinemas now and VI is in either production or post-producton.
Still, musn't grumble - 7/10