Highlights from the Sixth Episode of Season 4 of Hawaii Five-0

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Backing Up on "Kupouli 'la" Season 4 Episode 6

When Halloween comes to Hawaii and a zombie-like man is shot, Five-0 (Scott Caan, left, Alex O’Loughlin, center, with guest star Corbin Bernsen, right) races to stop a mad-man conducting experiments on humans, on HAWAII FIVE-0, Friday, Nov. 1 (9:00-10:00 PM, ET/PT) on the CBS Television Network. Photo: Norman Shapiro/CBS ©2013 CBS Broadcasting, Inc. All Rights Reserved.