第 18 季 共 20 集
播出时间：2020年11月18日
第 1 集 Sturgeon Season
播出时间：2020年11月18日
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.
第 2 集 Everything Starts Somewhere
播出时间：2020年11月25日
Flashbacks reveal the murder case that first introduced young Gibbs to NCIS and his introduction to young, new-to-America Ducky.
第 3 集 Blood And Treasure
播出时间：2020年12月9日
The discovery of two dead bodies in a forest leads the NCIS team into the wild world of modern-day treasure hunting. Also, Gibbs and Fornell get deeper into their search for the opioid kingpin.
第 4 集 Sunburn
播出时间：2021年1月20日
McGee and his wife Delilah's (Margo Harshman) 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.
第 5 集 Head of the Snake
播出时间：2021年1月20日
Gibbs and Fornell's crusade to find the head of the drug ring responsible for Fornell's daughter Emily's overdose comes to a climax. Also, Gibbs and Vance finally let the team in on a case that has dangerous implications.
第 6 集 1mm
播出时间：2021年1月27日
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.
第 7 集 The First Day
播出时间：2021年2月10日
NCIS 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
第 8 集 True Believer
播出时间：2021年3月3日
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. McGee, Bishop and Torres track down a hacker who emailed compromising information to the Taliban.
第 9 集 Winter Chill
播出时间：2021年3月10日
NCIS dives into the competitive world of food trucks after finding a man frozen to death in the back of one.
第 10 集 Watchdog
播出时间：2021年3月17日
NCIS uncovers a secret dogfighting ring, which leads to an unexpected move by one of the team members.
第 11 集 Gut Punch
播出时间：2021年4月7日
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.
第 12 集 Sangre
播出时间：2021年4月28日
Evidence from the stabbing of a Marine Sergeant leads Torres to meet his father who left when he was a child
第 13 集 Misconduct
播出时间：2021年5月5日
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.
第 14 集 Unseen Improvements
播出时间：2021年5月12日
NCIS tracks a stolen laptop to the uncle of a young boy, Phineas, Gibbs’ former neighbor.
第 15 集 Blown Away
播出时间：2021年5月19日
When members of an NCIS Regional Enforcement Action Capabilities Training Team (REACT) are killed during an explosion, NCIS Special Agent Jessica Knight (Katrina Law), the lone surviving member, helps crack the case using high tech body armor
第 16 集 Rule 91
播出时间：2021年5月26日
While pursuing a dangerous arms dealer, the team is shocked when Bishop is implicated in an old NSA leak while Gibbs and Marcie realize the killer they've been tracking may be onto them.
第 17 集 Episode 17
播出时间：2021年5月5日
第 18 集 Episode 18
播出时间：2021年5月12日
第 19 集 Episode 19
播出时间：2021年5月19日
第 20 集 Episode 20
播出时间：2021年5月26日
