How did Team NCIS say goodbye to Abby?
That was addressed on NCIS Season 15 Episode 22 when Abby made a shocking decision about her future.
Meanwhile, evidence revealed that an NCIS team member was set to be killed by a hitman, and the team had to look to the past to find the killer.
However, it quickly emerged that said hitman was not opposed to killing anyone who got in his way.
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Paul Dailly is a staff writer for TV Fanatic. Follow him on Twitter.