Daniel Dae Kim was the first actor cast
Most shows generally cast their leads first, but the producers of Hawaii Five-0 reversed that long-standing practice in 2010 when they began their casting process by selecting Daniel Dae Kim as Detective Lieutenant Chin Ho Kelly. Kim was an easy choice at the time since he had just finished his six-season run on Lost and could reasonably pass for a native Hawaiian despite his Korean heritage. Alex O'Loughlin, Scott Caan and Grace Park were added to the cast several days later to round out the show's fearsome foursome.
Scott Caan and Alex O’Loughlin didn't initially get along
Scott Caan and Alex O'Loughlin have always enjoyed excellent chemistry onscreen, but it took a while before these leading men could see eye-to-eye off the set. 'He>s alpha and I>m alpha so at first our egos kind of bumped,' Caan revealed in an interview with Metro. 'We were both sizing each other up, thinking: 'Alright, if we had to fight, how am I going to win this fight?>' The pair eventually let their guards down and were happy to discover they had plenty in common. 'We>re really good friends now,' Caan said. 'I support Alex and I have his back - I have nothing but nice things to say about him. But I don>t envy him - he>s got three kids and a dog and two assistants. Alex likes to complicate things.'
The show's principal villain is named after a Chinese restaurant
Leonard Freeman, the creator of the original Hawaii Five-O, didn't have to look hard when it came time to select a name for the program's principal villain. The Emmy nominee simply turned his gaze toward Honolulu's Chinatown where he spotted a restaurant named Wo Fat. The moniker appealed to Freeman immensely and he immediately assigned it to the show's chief criminal. The colourfully-named character went on to appear in 11 episodes of the original series and has already appeared in 13 episodes of the reboot. The restaurant that inspired his name, meanwhile, has long since been shuttered.
Scott Caan refuses to watch the series
Hawaii Five-0 routinely attracts 10 million viewers a week, but Scott Caan isn't one of them. The Los Angeles native actively avoids turning on the tube, regardless of who's gracing the screen. 'I don>t want to get too attached to watching a show because there>s too many other things I want to get done,' he explained in an interview with Metro. 'I have heard there>s fantastic television out there. People I respect are telling me they don>t watch movies any more, that they watch Breaking Bad and Claire Danes>s new show - I don>t even know what it>s called. I>m just quoting other people here; I don>t know if this is true.'
RoboCop directed an episode of the series
Best known for playing RoboCop, Oscar-nominated actor Peter Weller left his metal exoskeleton behind in 2013 when he was hired to direct and star in an episode of Hawaii Five-0. It was the first time anyone had simultaneously handled both jobs on the program and Grace Park was concerned that it may be asking too much of any one individual. 'I was a little worried about having a director who was also starring in it,' she admitted in an interview with Entertainment Weekly. 'It>s a bit of a monster of a show, so to have a first-time director on our show do that, I was a little worried. But he>s such a pro. It was smooth and everybody loved him.' Park was especially impressed with Weller's vision. 'He was great,' she said. 'He was very strong and knew what he wanted, and he was quite a personality.'
James MacArthur was supposed to appear in the series
James MacArthur, the actor who played Danno in the original series, was scheduled to appear during Hawaii Five-0's first season. Unfortunately the Los Angeleno was in ailing health at the time and died of natural causes on October 28, 2010 before he could film his episode.
The show's name isn't actually a reference to police
Contrary to popular belief, the Five-0 in the show's title isn't a reference to police officers. The name is derived from the fact that Hawaii became the 50th state to join the Union on August 21, 1959.
The show has boosted Hawaii's economy
It isn't unusual for a television series to have a positive economic impact on the city or town where it's filmed, but Hawaii Five-0's impact has been felt by businesses statewide. According to Hawaii News Now, Kona Brewing Company experienced a 60% increase in sales after their beer was featured on the show, and Waiola Shave Ice saw a 30% increase after being featured in select episodes. Even national monuments like the USS Missouri have benefitted as tourists have been flocking to the ship in record numbers since it was first featured on the series. Journalists have dubbed it the 'Five-0 Effect' and it doesn't appear to be waning any time soon.