Watch NCIS Season 18 full episodes online, free and paid options via our partners and affiliates.

Dealing with Trauma - NCIS
Watch NCIS Season 18 Episode 7
"The First Day"
Original Air Date:

On NCIS Season 18 Episode 7, the team investigates the murder of a Navy officer killed while driving home a released inmate and Gibbs helps Palmer deal with a trauma.

Shootout at the Sheriff's - NCIS
Watch NCIS Season 18 Episode 6
"1mm"
Original Air Date:

On NCIS Season 18 Episode 6, Bishop and Torres engage in a shootout in a former sheriff's residence, only to find themselves locked in abandoned jail cells there.

Dangerous Implications - NCIS
Watch NCIS Season 18 Episode 5
"Head of the Snake"
Original Air Date:

On NCIS Season 18 Episode 5, 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.

Not a Vacation - NCIS
Watch NCIS Season 18 Episode 4
"Sunburn"
Original Air Date:

On NCIS Season 18 Episode 4, McGee and Delilah's Bahamian vacation turns into a high-stakes mission when the case NCIS is tracking has ties to the island.

Deeper Into the Search - NCIS
Watch NCIS Season 18 Episode 3
"Blood & Treasure"
Original Air Date:

On NCIS Season 18 Episode 3, the discovery of two dead bodies in a forest leads the NCIS team into the wild world of modern-day treasure hunting.

Remembering the Beginning - NCIS
Watch NCIS Season 18 Episode 2
"Everything Starts Somewhere"
Original Air Date:

On NCIS Season 18 Episode 2, flashbacks reveal the murder case that introduced young Gibbs to a young, new-to-America Ducky, on the 400th episode.

Fornell and Gibbs Team Up - NCIS
Watch NCIS Season 18 Episode 1
"Sturgeon Season"
Original Air Date:

On NCIS Season 18 Episode 1, Gibbs and Fornell hunt down the leader of a drug ring who supplied drugs to Fornell's daughter, and a body goes missing from autopsy.

NCIS Season 18 Quotes

Close calls make you live harder.

Torres

Fornell: Then it's your own kid and you think, "Who's broken now?"
Gibbs: How's the pizza?