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'Hawaii Five-0' Season 4: 5 Spoilers You Need To Know

Kira  Wills Kira Wills
9/4/2013 2:15pm EDT

Hawaii Five-0

The fourth season begins with a bang.  Not only will McGarrett (Alex O'Loughlin) have to save the criminal who has terrorized his family for decades from a powerful enemy, but reports that the Five-0 headquarters will be attacked by gunman who discover Kono and Adam's location and puts Catherine in serious danger.  Methinks grenade-lovin' McG won't take this too well.  

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Photo Credits: CBS Corporation; PR Photos