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Watch NCIS: Los Angeles Season 4 full episodes online, free and paid options via our partners and affiliates.

No Longer Partners
Watch NCIS: Los Angeles Season 4 Episode 24
"Descent"
Original Air Date:

A devastating event ignites the rush to find stolen nuclear weapons and has Hetty making changes in the usual partnerships on the season 4 finale of NCIS: Los Angeles.

Kensi Watches Deeks
Watch NCIS: Los Angeles Season 4 Episode 23
"Parley"
Original Air Date:

Kensi's feelings become uncomfortable when she's forced to watch Deeks undercover with a female asset in a dangerous situation on NCIS: Los Angeles.

Callen Questions Hetty
Watch NCIS: Los Angeles Season 4 Episode 22
"Raven & the Swans"
Original Air Date:

Callen wonders about Hetty's motivations when she assigns the team a case involving a missing undercover operative from the past on NCIS: Los Angeles.

Deeks & Kenzi in Mexico
Watch NCIS: Los Angeles Season 4 Episode 21
"Resurrection"
Original Air Date:

When a cartel boss' body goes missing, Kenzi and Deeks head down to Mexico to investigate while Callen and Sam try to figure out if there's a leak in the DEA on NCIS: Los Angeles.

Answers In a Dumpster
Watch NCIS: Los Angeles Season 4 Episode 20
"Purity"
Original Air Date:

The team must figure out if cyanide put in a water jug is an isolated incident or a test for a much larger attack on NCIS: Los Angeles.

Kim Raver on NCIS: LA
Watch NCIS: Los Angeles Season 4 Episode 19
"Red, Part II"
Original Air Date:

Part II of the NCIS: LA event introducing us to Team Red.

NCIS Red Team
Watch NCIS: Los Angeles Season 4 Episode 18
"Red"
Original Air Date:

"Red" is the episode that will potentially launch the NCIS: Los Angeles spinoff. It refers to the new elite team we will meet.

Sam and G Talk It Over
Watch NCIS: Los Angeles Season 4 Episode 17
"Wanted"
Original Air Date:

Sam fears for his family's safety when his wife is called to resume a former CIA cover after a case suggests ties to the infamous Sidorov and his stolen nukes.

Sam Helps An Old Friend
Watch NCIS: Los Angeles Season 4 Episode 16
"Lokhay"
Original Air Date:

When an Afghan elder's nephew is missing, Sam offers to help on NCIS: Los Angeles.

Kensi's In the Woods
Watch NCIS: Los Angeles Season 4 Episode 15
"History"
Original Air Date:

The team must interrogate a lone survivor of a terrorist group to find out if the organizations' future plans on NCIS: Los Angeles.

Chris O'Donnell and LL Cool J
Watch NCIS: Los Angeles Season 4 Episode 14
"Kill House"
Original Air Date:

Callen, Sam, Kensi and Deeks go undercover as an elite tactical force in order to investigate an ambush tied to a cartel kingpin with terrorist connections.

Callen's Undercover Plans
Watch NCIS: Los Angeles Season 4 Episode 13
"The Chosen One"
Original Air Date:

Callen goes undercover to fight a terrorist group before they can attack on this episode of NCIS: Los Angeles.

Armed and Prepared
Watch NCIS: Los Angeles Season 4 Episode 12
"Paper Soldiers"
Original Air Date:

The 12th episode of NCIS: Los Angeles' fourth season. Synopsis and recap to come soon!

Deeks & Kensi Undercover
Watch NCIS: Los Angeles Season 4 Episode 11
"Drive"
Original Air Date:

A former defendant of Deeks is targeted for discovering information that could dismantle a lucrative car shipping operation with links to a global terrorist ring.

Death on an Aircraft Carrier
Watch NCIS: Los Angeles Season 4 Episode 10
"Free Ride"
Original Air Date:

The team spends the holiday on an aircraft carrier while they investigate the death of another NCIS special agent on NCIS: Los Angeles.

Agent Marty Deeks
Watch NCIS: Los Angeles Season 4 Episode 9
"The Gold Standard"
Original Air Date:

The team investigates the strange and brazen heist executed by gunmen in costumes that could directly impact the U.S. economy.

Chris O'Donnell and LL Cool J
Watch NCIS: Los Angeles Season 4 Episode 8
"Collateral"
Original Air Date:

The eighth episode of NCIS: LA Season 4. Synopsis and recap to come soon!

Kensi and Deeks Surfing
Watch NCIS: Los Angeles Season 4 Episode 7
"Skin Deep"
Original Air Date:

The seventh episode of NCIS: LA Season 4. Synopsis and recap to come soon!

Agent Hanna, NCIS LA
Watch NCIS: Los Angeles Season 4 Episode 6
"Rude Awakenings"
Original Air Date:

The sixth episode of NCIS: LA Season 4. Synopsis and recap to come soon!

LL as Sam Hanna
Watch NCIS: Los Angeles Season 4 Episode 5
"Out of the Past, Part I"
Original Air Date:

When a CIA agent who worked with Sam Hanna over eight years ago seeks his help and is soon found dead of an apparent suicide, Hanna and Callen suspect foul play and a bigger conspiracy.

Watch NCIS: Los Angeles Season 4 Episode 4
"Dead Body Politic"
Original Air Date:

The NCIS: LA team investigates the tragic death of a U.S. senatorial candidate's staffer who is run over crossing the street.

Marty Deeks Pic
Watch NCIS: Los Angeles Season 4 Episode 3
"The Fifth Man"
Original Air Date:

The NCIS: LA team investigate a compromised intel operation after four people connected to the classified project are killed at a diner explosion.

Chris as G
Watch NCIS: Los Angeles Season 4 Episode 2
"Recruit"
Original Air Date:

A drone strike on a bomb-making compound in Afghanistan reveals the body of a recently retired Marine, leaving the NCIS: LA team to investigate why the Marine returned to Afghanistan.

Callen in a Wetsuit
Watch NCIS: Los Angeles Season 4 Episode 1
"Endgame"
Original Air Date:

Following Callen's public shooting of the Chameleon, he is placed on suspension while Hetty adjusts to retired life on the Season 4 finale.

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