On Monday's episode of Hawaii Five-0, the team went swimming for sunken treasure.

Next week, conversely, they'll go hunting for any proof that Kono hasn't truly turned to the dark side. But it won't be easy, not after the information that turns up after a women's volleyball coach is found murdered.

Elsewhere, look for Chin Ho to reunite with his ex-fiancee, played by Reiko Aylesworth. Enjoy the official promo now for "Ma'ema'e."