Watch NCIS Online: Season 16 Episode 21

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Did Kasie get the pat on the back she's been looking for all season long?

On NCIS Season 16 Episode 21, the genius entered a cold case DNA into the system. 

In doing so, she cracked a 30-year-old murder case. 

Thanks to a legal loophole, the system was poised to let the murder suspect free. 

Did the team manage to change things up so that the person accused of the deed was sent away?

Deep Trench - NCIS Season 16 Episode 20

Meanwhile, McGee visited an elite technology company in Sillicon Vallery that was offering him a highly paid position. 

Did he depart the team for good?

Use the video above to watch NCIS 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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NCIS Season 16 Episode 21 Quotes

Dead gets us DNA now.


I wanted to kill the man who killed my family.