Paradise Pushed to the Brink. When there's trouble in the tropics, Five-0 are the only two numbers you need to know. Under the watch of Lt. Commander Steve McGarrett (Alex O'Loughlin), and Detective Sgt. "Danno" Williams (Scott Caan), the HPD will marshal its forces to whack a mole in the CIA, stop the killing spree of a serial SEAL assassin, and shut down a meth lab tucked away in a B&B discovered by Mary Ann McGarrett (Taryn Manning). Whether they're tracking the fugitive hacker Aaron Wright (Joey Lawrence) before he can sell cyberweapons to the highest bidder, reliving a cold case back in the 1940s (the series' 200th episode), or running cosmetic counter-intelligence to bust up a beauty of a pyramid scheme, the Honolulu Police Department has your number in Hawaii Five-0: Season 9, featuring all 25 killer episodes.