NCIS stands for Naval Criminal Investigative Service. The series chronicles the operations of an elite team of special agents whose mission is to investigate any crime that has a shred of evidence connected to Navy and Marine Corps personnel, regardless of rank or position.
Alden Parker is still on the run with his ex-wife Vivian. The team investigates who might have a personal vendetta against him in the hope of clearing Parker's name.
McGee's personal and professional lives intersect when a dad from his children's school is linked to a break-in at a government storage bunker.
The team tries to determine the motive behind the crime when a dead body is found at an ancient burial site. Torres continues therapy with Dr Grace.
Agent Knight's past resurfaces when her ex-boyfriend, a National Parks Service agent, teams up with NCIS to investigate a campsite murder.
Agent Parker steps up to protect Director Vance after a terrifying home invasion. The team notes developments in Jessica and Jimmy's blossoming romance.
While investigating the death of a fellow NCIS agent, the team realises someone has been secretly investigating them to locate a possible mole.
NCIS investigate the Secretary of the Navy when her husband starts accusing her of attempting to murder him.
An unknown shooter causes chaos at an annual Thanksgiving 5K, and Kasie joins Knight for lunch at Knight's sister's house.
The team investigate the death of a college student who was hit by a truck after inexplicably stripping in the street and running into the road.
The team are in Washington DC to celebrate the retirement of their former professor, but have to investigate when tragedy intervenes.
Parker discovers he's a victim of identity theft while investigating the unusual murder of a Navy ensign. Knight and Jimmy face hurdles in their relationship as their connection heightens.
When an old friend of Torres' comes to him for guidance amid an undercover FBI operation and then disappears, NCIS helps track him down. McGee prepares to be a contestant on a game show.
In preparation for a role, a world-renowned actress shadows the NCIS team as they investigate a decapitation case.
Parker grapples with his emotions when a con man from his past turns up as a murder suspect.
NCIS investigates the death of a ride-share driver who was found after a car accident. Parker's dad, who is temporarily living with him, assists the team in their investigation.
The NCIS team starts to investigate who is responsible for a potential bio terror attack at a strip mall parking garage. (S20 Ep16)
NCIS works to solve the murder of a marine who killed for helping Afghan refugees. Jimmy Palmer navigates the pressures of parenting when his teen daughter is eager to go on a date. (S20 Ep17)
The NCIS team digs deep to investigate a Navy lieutenant who's accused of trying to murder her husband, but has no memory of the attack. Kasie navigates a potential medical scare. (S20 Ep18)
Agent Knight goes viral for saving a mother and her young son from a potentially fatal car accident. The NCIS team investigate and discover a connection to an ongoing DEA case. (S20 Ep19)
NCIS works to solve the murder of a senator's daughter who has a rebellious reputation and large online following. Jimmy gets competitive with an old college rival. (S20 Ep20)
When a murder occurs in the classified section of the National Archive, NCIS must investigate a string of Russian spy encounters that might be linked to the crime. (S20 Ep21)
In the season 20 finale, Torres finds himself in prison as the team tries to stop an impending terror attack on U.S. soil. (S20 Ep22)