Watch Hawaii Five-0 Online: Season 10 Episode 21

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Did Danny survive?

On Hawaii Five-0 Season 10 Episode 21, Steve got a posthumous letter from his mother that contained a cypher. 

Chilling With Wine - Hawaii Five-0 Season 10 Episode 20

But a hacker stepped in for the kill to get his hands on it. 

Meanwhile, the Five-0 helped Lincoln Cole, an anonymous good samaritan who was in the crosshairs of some very dangerous people. 

With lives on the line, things took a turn that could change the fabric of the entire series. 

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

Catch up on all your favorite shows and reviews and join in the conversations with other fanatics who love TV as much as you.

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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 10 Episode 21 Quotes

The last thing I need in my life is another mystery.

McGarrett [to Danny]

McGarrett: How'd you find me?
Danny: I'm a cop.