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While McGarrett's Aunt Deb visits Oahu on a special personal mission, Five-0 must uncover who stole unstable Japanese WWII bombs left hidden on the island, on "Ua ola loko i ke aloha (Love Gives Life Within)."

Peter Lenkov controls the future—at least on Hawaii Five-0, where he serves as Executive Producer. In this exclusive Q&A, Peter answers questions submitted by fans about the biggest plot twists and exciting action in store for the rest of Season 6.

McGarrett and Danny attend a couples retreat to work on their partnership in "Kuleana (One's Personal Sense of Responsibility)."

The Hawaii Five-0 actor celebrates his birthday on December 27. In honor of his big day, here are 10 things you didn't know about the Hawaii Five-0 star.