Christian George

A Hawaiian luau turns into a nightmare when the body of a dead cop, who turns out to be Danny's ex-partner from the Honolulu P.D., is found in the barbeque pit. Five-0's dogged investigation into the murder matches them against Internal Affairs, dirty cops and Hawaii's most powerful cocaine cartel.

Five-0 is first on the scene when a pirate attack turns an afternoon pleasure cruise into a kidnap-and-ransom nightmare for a group of wealthy spring breakers.

The team hunts for a person who jeopardized a classified vaccine project; Deeks returns.

Nate Getz fails to make contact with Hetty while working undercover with an infamous crime leader.

When DOJ Agent Lance Hamilton's partner is killed, Sam dons his previous undercover persona of "Switch" to find the culprit. Also, Kensi, Deeks, Roundtree and Kilbride work to catch an aerospace engineer who stole classified Navy schematics.