All signs are pointing to a wedding between Kono (Grace Park) and Adam (Ian Anthony Dale) on the season finale of Hawaii Five-0, but will they get hitched without a hitch? Of course not, it's TV!

Kono and Adam are totally crazy-nuts in love. That's not the problem. "Everything's quite good with that relationship," Park tells TVGuide.com. "It's not like she's needing to sow oats with anyone. I think she finally thinks that it is a good time [to get married]."

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So what will ruin the big day? Let's just say that even though his nemesis Wo Fat is out of the picture, Adam's ties to the Yakuza remain. "Wo Fat was a thorn in their side, [but] Wo Fat was one of the knowns," Park says. "There are so many things that are unknown that could pop up. ... There continues to be ghosts rising out of Adam's past, and... they do nip at their relationship."

Hawaii Five-0 airs Fridays at 9/8c on CBS.

(Full disclosure: TVGuide.com is owned by CBS.)