Did Nell manage to help the team when they need it the most?
On NCIS: Los Angeles Season 12 Episode 12, Callen was kept in the dark about the team's search for Katya.
But Callen was too busy to notice because he was tracking down the person tailing him in a remote location.
Did he finally come face to face with Anna after another big twist in the tale?
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Paul Dailly is the Associate Editor for TV Fanatic. Follow him on Twitter.