September 23, 2014 (2014-09-23) – May 12, 2015 (2015-05-12)
Season chronology
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List of episodes
The twelfth season of the police procedural drama NCIS premiered on September 23, 2014, in the same time slot as in the previous seasons, Tuesdays at 8 pm. This is the first season in which NCIS: Los Angeles did not air after NCIS. This season, NCIS: New Orleans aired after NCIS.[1] The entire season eleven cast renewed their contracts and returned for the new season.[2] The premiere episode aired on September 23, 2014 and was seen by 18.23 million people.[3]
The main antagonist of the season is Sergei Mishnev, played by Alex Veadov. This character first appears in the premiere episode "Twenty Klicks".[4] In episode four, "Choke Hold", one of Sergei's associates is sent to the United States to kill a Russian scientist who refused to work with him. Anton Pavlenko (previously seen in "Twenty Klicks"), portrayed by Lev Gorn, a Russian counselor, reappears in this episode.[5] Veadov returns as Sergei in "Check" where he "gets personal" with Gibbs by killing Gibbs' ex-wife Diane in the same way that Caitlin Todd was killed, stalking Rebecca, another of Gibbs' ex-wives, and staging murders mimicking the deaths of Mike Franks and Jenny Shepard. Sergei returns again in "Cabin Fever", where he is killed by Tobias Fornell, who was also married to Diane at one point and who was dealing with intense grief and depression following Diane's murder. It is revealed that Sergei and Ari Haswari are half brothers from Ari's mother, whereas Ari and Ziva David were half brother and sister from their father, Eli David.
^"CBS Announces a Multi-Phase Rollout for Fall Premiere Dates". TV Line. June 24, 2013. Archived from the original on September 9, 2014. Retrieved September 23, 2014.
^Mitovich, Matt Webb (May 5, 2014). "Exclusive: Entire NCIS cast signed for Season 12". TV Line. Archived from the original on September 23, 2014. Retrieved September 24, 2014.
^Cite error: The named reference 12x01 was invoked but never defined (see the help page).
^Halterman, Jim (July 18, 2014). "NCIS Season 12: A New Villain, A New Romance, A Trip to New Orleans". TV Fanatic. Archived from the original on October 6, 2014. Retrieved October 4, 2014.
^Wolfe, Douglas (October 14, 2014). "NCIS Season 12 Episode 4 Review: Choke Hold". TV Fanatic. Archived from the original on October 18, 2014. Retrieved October 15, 2014.
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