Craig Henningsen

As a dangerous hurricane hits Oahu, Five-0 is tasked with protecting El Diablo, a captured serial killer who is being hunted by an assassin; Tani's civilian safety check during the storm turns deadly; Rachel and Charlie evacuate to Danny's house.

When the boys get tested for STDs, Artie tests positive for a disease and he’s forced to tell his sexual partners. Meanwhile, Kurt and Blaine have relationship issues when Blaine puts on his “freshman fifteen.” Musical performances include "Addicted To Love", "I Want To Know What Love Is", "Let's Wait Awhile", and "Love Is A Battlefield".

On the season finale, Magnum and Higgins are sent on a deadly mission inside a high security correctional centre.

Will's first day brings unforeseen challenges; Katie gets her first assignment; Maddie and an old acquaintance reconnect; Carols pays for Will's collaboration.