NCIS Database

NCIS Season 18 premiered on November 17, 2020. CBS has ordered 16 for this season due to ongoing COVID-19. The season concluded on May 25, 2021.


Name Portrayed by Role Notes
Leroy Jethro Gibbs Mark Harmon NCIS Special Agent in Charge. Inactive and suspended indefinitely.
Timothy McGee Sean Murray NCIS Senior Special Agent.
Nicholas Torres Wilmer Valderrama NCIS Special Agent.
Eleanor Bishop Emily Wickersham NCIS Special Agent.
Jacqueline Sloane Maria Bello (episode 1–8 only) NCIS Forensic Psychologist.
James Palmer Brian Dietzen Chief Medical Examiner. Former Medical Assistant.
Kasie Hines Diona Reasonover NCIS Forensic Specialist
Leon Vance Rocky Carroll Director of NCIS.
Donald Mallard David McCallum NCIS Historian and Archivist. Former Chief Medical Examiner.

Cast Notes[]


  • This season marks the final appearance of both Maria Bello (Jacqueline Sloane) and Emily Wickersham (Eleanor Bishop) with Bello leaving NCIS after "True Believer" and Wickersham departing after the NCIS Season 18 finale episode, "Rule 91".
  • This is also the shortest season in the history of the NCIS series, airing only sixteen episodes.
  • NCIS Season 18 aired alongside NCIS: Los Angeles Season 12 and NCIS: New Orleans Season 7 which was also the final season for the entire NCIS: New Orleans series.


Episode Number Production Title Airdate Summary
Series Season Code
399 1 1802 Sturgeon Season (episode) November 17, 2020 Gibbs and Fornell attempt to track down the leader of a drug ring who supplied drugs to Fornell's daughter. Also, the team deals with the case of a missing cadaver from the NCIS autopsy room.
400 2 1801 Everything Starts Somewhere (episode) November 24, 2020 Flashbacks reveal the murder case that first introduced young Gibbs to NCIS and his introduction to young, new-to-America Ducky.
401 3 1803 Blood and Treasure (episode) December 8, 2020 The discovery of two dead bodies in a forest leads the team into the wild world of modern-day treasure hunting, and Gibbs and Fornell get deeper into their search for the opioid kingpin.
402 4 1804 Sunburn (episode) January 19, 2021 McGee and Delilah's Bahamian vacation turns into a high-stakes mission when a case NCIS is tracking of a dead escape room manager has ties to the island. Also, Gibbs fears the worst when his search for Fornell leads to blood.
403 5 1805 Head of the Snake (NCIS episode) January 19, 2021 Gibbs and Fornell's crusade to find the head of the drug ring responsible for Emily's overdose comes to a climax. Also, Gibbs and Vance finally let the team in on a case that has dangerous implications.
404 6 1806 1mm (episode) January 26, 2021 Following a tip about smuggled weapons, Bishop and Torres engage in a shootout in a former sheriff's residence that's now a historical site, only to find themselves locked in abandoned jail cells there.
405 7 1807 The First Day (episode) February 9, 2021 The team investigates the murder of a Navy officer who was killed while driving home a recently released inmate. Also, Gibbs helps Palmer deal with a personal trauma.
406 8 1808 True Believer (episode) March 2, 2021 When Sloane's name is discovered in Afghanistan at the site of an abandoned bus with a dead driver, Gibbs accompanies her on a trip to find a group of girls who were kidnapped from the bus. Also, McGee, Bishop and Torres track down a hacker who emailed compromising information to the Taliban.
407 9 1809 Winter Chill (episode) March 9, 2021 The team dives into the competitive world of food trucks after finding a man frozen to death in the back of one.
408 10 1810 Watchdog (episode) March 16, 2021 The team uncovers a secret dogfighting ring, which leads to an unexpected move by one of the team members.
409 11 1811 Gut Punch (episode) April 6, 2021 Vance assigns McGee, Torres and Bishop to COVID compliance duty at a foreign affairs summit, where they discover a link to another NCIS team's murder case.
410 12 1812 Sangre (episode) April 27, 2021 Evidence from the stabbing of a Marine Sergeant leads Torres to meet his father, who left when he was a child.
411 13 1813 Misconduct (episode) May 4, 2021 While the team investigates a biker killed in a hit and run, Gibbs prepares to testify against a financial advisor who stole millions from his Navy clients.
412 14 1814 Unseen Improvements (episode) May 11, 2021 The team tracks a stolen laptop to the uncle of a young boy who is Gibbs' former neighbor.
413 15 1815 Blown Away (episode) May 18, 2021 When members of an NCIS Regional Enforcement Action Capabilities Training Team (REACT) are killed during an explosion, Special Agent Jessica McKnight, the lone surviving member, helps crack the case using high tech body armor.
414 16 1816 Rule 91 (episode) May 25, 2021 While pursuing a dangerous arms dealer, the team is shocked when Bishop is implicated in an old NSA leak. Also, Gibbs and Marcie realize the killer they've been tracking may be onto them.


From the Region 2 DVD- Every threat is worth the risk- A shocking start to Season 18 of NCIS launches the team into a year like no other. The action begins with a bang and spools up from there. Answering the mystery of where Gibbs disappeared last season, we follow him through his secret mission. But global threats never stop as the rest of the team brave new dangers and higher risks. In the landmark 400th episode, we delve into Gibbs's first day at NCIS with his future colleague, Ducky... and the rest is history. Follow up the season with an in-depth look at NCIS with a range of exclusive special features- 2 featurettes plus cast and crew commentaries on select episodes!


  v - e - d Seasons of NCIS
NCIS Season 1NCIS Season 2NCIS Season 3NCIS Season 4NCIS Season 5NCIS Season 6NCIS Season 7NCIS Season 8NCIS Season 9NCIS Season 10NCIS Season 11NCIS Season 12NCIS Season 13NCIS Season 14NCIS Season 15NCIS Season 16NCIS Season 17NCIS Season 18NCIS Season 19NCIS Season 20