Flashbacks reveal the murder case that first introduced young Gibbs (Sean Harmon) to NCIS and his introduction to young, new-to-America Ducky (Adam Campbell).

Blood and Treasure

S18 E3

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.

Sunburn

S18 E4

McGee and his wife Delilahs (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.

Head of the Snake

S18 E5

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

1mm

S18 E6

Following a tip about smuggled weapons, Bishop and Torres engage in a shootout in a former sheriffs residence that’s now a historical site, only to find themselves locked in abandoned jail cells there.

The First Day

S18 E7

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.

True Believer

S18 E8

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.

Winter Chill

S18 E9

NCIS dives into the competitive world of food trucks after finding a man frozen to death in the back of one.

Watchdog

S18 E10

NCIS uncovers a secret dogfighting ring, which leads to an unexpected move by one of the team members.

Gut Punch

S18 E11

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

Sangre

S18 E12

Evidence from the stabbing of a Marine Sergeant leads Torres to meet his father, Miguel (Steven Bauer), who left when he was a child.

Misconduct

S18 E13

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.

Unseen Improvements

S18 E14

NCIS tracks a stolen laptop to the uncle of a young boy, Phineas (Jack Fisher), Gibbs' former neighbor.

Blown Away

S18 E15

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.

Rule 91

S18 E16

While pursuing a dangerous arms dealer, the team is shocked when Bishop is implicated in an old NSA leak.