When someone misses a checkpoint there's almost always something wrong.
On NCIS: Los Angeles Season 7 Episode 20, the team learned that Nate Gertz was in cahoots with an infamous crime leader.
The double cross came about when he failed to check in with Hetty, but things got more sinister when they realized that the person he was working with is wanted for acts of terrorism.
Did the team get him before it was too late?
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Paul Dailly is the Associate Editor for TV Fanatic. Follow him on Twitter.