At the end of the Season 18 NCIS finale, Eleanor Bishop (Emily Wickersham) resigned her job after it was discovered that she had leaked an NSA document 10 years earlier. However, it was really just a ploy to become a disgraced agent so she could go undercover on an operation.

Is Bishop leaving NCIS?

On Tuesday's (May 25) season 18 finale of the CBS hit crime drama, Wickersham's character, Ellie Bishop, was sent off on a secret undercover mission. But fans were surprised to see that the star took to Instagram to confirm that this mission means her character is leaving the procedural for good.

Is Mark Harmon leaving NCIS for good?

WASHINGTON — Actor Mark Harmon is exiting CBS's long-running hit drama "NCIS" after an impressive 18-year run, helping to make it TV's most watched drama series, as the Hollywood Reporter notes. Harmon, who is also an executive producer for the show, has been a huge part of its success from the beginning.