Watch Hawaii Five-0 Online: Season 10 Episode 1

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Who was this mysterious new ally?

That was the big question on Hawaii Five-0 Season 10 Episode 1 when Katrina Law made her debut as someone who had a difficult past. 

The Divide Deepens - Hawaii Five-0 Season 9 Episode 25

But McGarrett and the rest of the team worried that she got too attached to the cases. 

The gang turned to her for assistance when it emerged that mob bosses who worked on the island were being targeted by an assassin. 

But who was this mysterious assassin?

Bad Decision - Hawaii Five-0 Season 9 Episode 25

Meanwhile, someone on the team realized that it was time for pastures new and geared up for an exit.

Did the team allow the person to move on, or did they manage to keep them in Hawaii?

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 10 Episode 1 Quotes

McGarrett: Words just keep falling out of my mouth. I don't know why.
Danny: Do you have any game at all?

Hello, boys!

Tani