Sonya Seng

Upon returning to Hawaii to investigate his father's murder, decorated Naval officer Steve McGarrett is recruited by the Governor to head up an elite new police task force - his rules, her backing, no red tape.

In the season premiere episode, "A Tale of Two Cities," Jack, Kate and Sawyer begin to discover what they are up against as prisoners of "The Others."

McGarrett and the team investigate when a deadly hit-and-run involves a driverless car carrying heroin, and what could be a new means for delivering drugs. Also, Tani and Quinn are stuck with a pair of YouTubers (comedy duo Tom Allen and John Parr) who are brought on a ride-along with Five-0.

After discovering something odd just offshore, Jack and Sayid come up with a plan to confront "The Others" and hopefully get Walt back. Meanwhile, Eko and Locke come to blows as Locke makes a potentially cataclysmic decision regarding the "button" and the hatch, on the season finale.