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

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But How Did He Do It? in “Pe'epe'e Kānaka” S4 E20

The investigation of a murdered pool cleaner leads Five-0 to uncover a possible terrorist cell of radicalized students who are plotting an attack on U.S. soil, on HAWAII FIVE-0, Friday, April 25 (9:00-10:00 PM, ET/PT) on the CBS Television Network. Pictured (l-r) Grace Park as Kono Kalakaua , Alex O’Loughlin as Steve McGarrett and Masi Oka as Dr. Max Bergman Photo: Best Possible Screen Grab/CBS /©2014 CBS Broadcasting, Inc. All Rights Reserved