Watch Hawaii Five-0 Online: Season 9 Episode 21

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Was a girl missing for 20 years still alive?

On Hawaii Five-0 Season 9 Episode 21, the mysterious murder of a man whose body could hold the key to unveiling the truth shocked the team. 

In the quest for answers, McGarrett turned to the girl's father who never gave up the search for his daughter. 

Did the truth finally come out?

Cold Case Solved - Hawaii Five-0 Season 9 Episode 20

Meanwhile, the rest of the team worked on the case involving the gun that seemed to have been passed down generations. 

How did it all play out?

Use the video above to watch Hawaii Five-0 online right here via TV Fanatic. 

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Paul Dailly is the Associate Editor for TV Fanatic. Follow him on Twitter.

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Hawaii Five-0 Season 9 Episode 21 Quotes

Danny: You don't know me. Shut up.
Ricky: That's exactly what a cat would say.

I just want to capture the exact moment when your dreams crumbled around you.

McGarrett [to Danny]