Months of voting have come down to this moment - the Hawaii Five-0 fan built episode will air this Friday night.

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While viewers know the major plot points, there will be one major surprise during "Ho'i Hou (Reunited)" - aside from the identity of this weeks killer.

Steve McGarrett (Alex O'Loughlin) is hell-bent on unearthing clues about his mother and Wo Fat (Mark Dacascos), and the intrepid Navy SEAL won't stall his investigation just for a murder at Chin's (Daniel Dae Kim) high school reunion.

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Instead, McGarrett and Danno (Scott Caan) will have spent the time between episodes chasing down a lead in Cambodia. Thanks to Jerry (Jorge Garcia) and Papa McGarrett's old toolbox of mystery, McGarrett now knows that his mother's old Shelburne identity has links to an unmarked grave in Southeast Asia and he will be quick to try and track it down.

Unfortunately, it looks like the duo's trip will be for naught (see video below). After flying halfway across the Pacific, McGarrett will be frustrated to learn that the grave is actually empty. Whether it has been that way for years, or whether the CIA beat McGarrrett to the punch, will remain a matter for speculation. At least for now.

Hawaii Five-0 airs Fridays at 10 p.m. ET on CBS.

Tags: Hawaii Five-O CBS television