Jason Quinn

A violent convict escapes from prison and kidnaps a young couple on vacation; McGarrett's estranged sister comes to town.

Kai goes under cover with one of Hawaii's oldest surf gangs when a petty officer is murdered.

When a college professor is killed, Five-0 goes back to school with Danny, who is posing as the professor's replacement.

The investigators probe what appears to be gang-related gunplay in a hospital emergency room, then discover a cheating girlfriend may be the catalyst for the shooting.

Magnum and Higgins are each hired by two people who are in the middle of a contentious divorce to dig up dirt on the other; Rick and TC look into the death of an unidentified man and must share the news with his estranged daughter.

After questioning orders to fire nuclear missiles into Pakistan, Captain Marcus Chaplin (Andre Braugher) and the crew of the nuclear sub USS Colorado are deemed traitors by their own country. Forced to take refuge on an exotic Pacific island, they must fight to clear their names so that they can return home.