Watch Hawaii Five-0 Online: Season 9 Episode 23

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What were Mary's neighbors up to?

On Hawaii Five-0 Season 9 Episode 23, McGarrett helped his visiting sister make sense of what the neighbors were up to. 

However, the brother and sister found themselves in a deadly situation. 

Meanwhile, the Five-0 investigated the murders of a ride-share driver and his passenger. 

Old Friends - Hawaii Five-0 Season 9 Episode 22

Elsewhere, the team teased the youngest members of Five-0 when Junior escorted Tani to a wedding. 

How did it all play out?

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.

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

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Hawaii Five-0 Season 9 Episode 23 Quotes

So you think you can read my eyebrows? You'd have better luck reading sanskrit.

Grover [to Tani]

Hey, don't listen to [McGarrett]. We don't.

Danny [to Mary]