Kono (Grace Park) has successfully defeated the elements in last week's episode and everything is set for her and Adam's (Ian Anthony Dale) wedding. But Chin (Daniel Dae Kim) has reservations about it.

As reported by Spoilers Guide, the Friday May 8 finale at 8 p.m. will feature the last two episodes of the season, and things go from bad, to worse, to devastating.

In the first episode of the night, titled "Luapo'i," Rachel (guest star Claire van der Boom) has a long-held secret, which could have serious consequences, especially after she reveals it to Danny (Scott Caan). But we also see that as Kono's (Grace Park) wedding is quickly approaching, Chin has reservations about Adam's professional pursuits. He speaks with McGarrett (Alex O'Loughlin) and tells him he thinks Adam is still working with Yakuza, which put's them in a precarious position.

The next episode, titled "A Make Kaua," the eve of Adam and Kono's wedding leads the entire island to a potential disaster. A fanatical patriot is on the island with a stolen nuclear bomb, which he plans to detonate and ramp up the war on terror. His ominous plans are to frame a terrorist leader for the incident and ultimately redefine the war on terror.

The Five-O unit finds out about this and the episode becomes a terrorizing race against time to find the stolen bomb and secure the payload. Adding to the complications of the night is the stunning return of Catherine (Michelle Borth) to Hawaii, which puts McGarret into a nasty tailspin. This episode will also feature Chin confronting Adam about his possible connections to the Yakuz, which could ultimately derail the wedding alone if his suspicions are proven reliable.

In an interview with Entertainment Tonight, Grace Park opened up about what she thinks the best things about the show have been lately.

"We've had the addition of a couple new actors. Their presence is really such a relief. We all breathe a little easier," Park told ET. "It's different carrying a show with six people than it is with four people. It's like all these pieces go into this magnificent, living, moving puzzle. When it works, it's kind of magic, and when it doesn't, you realize there is no hard and set formula."