Following a harrowing experience in Afghanistan, a war veteran Wesley Cole (Seann William Scott) finds himself working for the LAPD issuing parking tickets as a way to get closer to his daughter and estranged ex-wife. A chance encounter with Chechnyan mobsters pairs Cole with Murtaugh, who is still reeling from Riggs's death and is considering retirement. Following the successful capture of the criminals, Cole learns that Murtaugh recommended him for the position of homicide detective. This was
Murtaugh thinks partnering with Cole was a mistake after they are tasked to work with the FBI regarding a case involving the Sureños. While wrapped up in his own problems, Roger forgets that Trish is still dealing with post-traumatic issues from her capture at the hands of Riggs's father. Meanwhile, Cole learns that his ex-wife is in a relationship with Andrew (Jonathan Sadowski), an anesthesiologist, which burdens him seeing that her and his daughter have moved on.
Murtaugh and Cole stumble upon a lotto scam, in which the benefactors are being targeted by a criminal group. Natalie allows Cole to spend a day with their daughter, who sees a bit too much when Cole takes her to work. Meanwhile, Roger has to deal with his condescending father-in-law (Richard Roundtree), a retired federal judge who is visiting.
Cole thinks about his service at the CIA when he gets an unexpected visit from a past figure; Murtaugh has difficulties with his own mistakes after a new murder puts doubts on a suspect he imprisoned in the past; Leo Getz comes back as an attorney.
Cole and Murtaugh investigate a truck that was full of fine art until robbers attacked it. Cole struggles with his feelings for Natalie after discovering that Andrew is planning to propose to her. During the investigation, Cole develops a relationship with the mind behind the robbery, Layla Khudari (Annet Mahendru), who disguised herself as an employee of the art owner. Meanwhile, Riana deceptively convinces Murtaugh to let her attend a concert after discovering that her father is still keeping
Cole and Murtaugh investigate a deposit box robbery. Later on, he and Murtaugh cross paths with Cole's former mentor, Tom Barnes (Mykelti Williamson). Meanwhile, Murtaugh butts heads with Trish's new client and asks for Bailey's help to investigate her. Cole remembers a target from one of his past missions as he joins Barnes to eliminate a rogue CIA agent. When Sofia Vasquez, the wife of the target he killed appeared, everything goes awry and he is forced to kill the rogue agent. Afterwards, Mur
In Murtaugh's home, Riana tries to convince her parents to let her go on a date. Meanwhile, Vasquez and her Cartel captured Cole and buries him alive, which prompting Murtaugh to ask for Barnes's assistance. On Barnes's suggestion, Murtaugh secretly released Vasquez's former lieutenant, Benny Alvila, in exchange for information. After Cole is rescued, he deduces Barnes' schemes regarding Alvila. Cole incapacitates Murtaugh before leaving to stop Alvila, but the latter manages to recover while al
A car bomb is set off outside a restaurant a witness named Elliott works at, but he is not killed. Elliott is helping to build a case against a Tony Corsetti. Murtaugh & Cole are tasked to watch Elliott, but Cole goes to find Tony at the restaurant. When he gets there, someone has killed Tony leading Cole, who takes Erica and her car, on a high-speed car chase. Natalie has not told Andrew about when her and Cole kissed recently. Cole hopes to meet with Natalie in order to talk about their relati
A young Cole, in the year 1993 in Slovakia, gets beat up by another boy at school for not knowing the language. He gets comforted by his mother. Maya is spending Christmas with Cole. Murtaugh wants to throw a party for RJ coming home from Costa Rica. Two house burglars are interrupted by the homeowners. The wife shoots one of the burglars with a shotgun. Cole recognizes the dead burglar by the tattoo on his neck. Cole saw him talking to a friend of his, Oscar, who is an ex-con, at the hotel he l
Cole finds himself on the rebound after Natalie's engagement, and his new romantic interest, Julie, has an unexpected connection to A.D.A. Erica, complicating things at work. Meanwhile, Murtaugh worries about the connection between the murder he's investigating and a new opportunity for Trish to serve as co-counsel on a high-profile lawsuit with Leo Getz.
We open with Murtaugh being interrogated. The Murtaugh family goes on a vacation to a resort. Turns out Cole is also being interrogated! Cole is working cases with Erica, the new D.A. Erica's mom, who is a Senator, is in town. Cole starts working a murder case while Murtaugh is on vacation. Murtaugh throws his back out while on vacation and starts spying on people within the resort hotel with his camera.
Murtaugh is giving a speech at the police academy telling a story back in 2007 about him and Avery, while exaggerating a bit about the story making himself look good. Cole and Erica are in bed together. Maya is dropped off causing Erica to leave. A man named Mark Hardy is killed participating in an underground fight club, but his body was moved to a gym owned by his brother. Cole and Roger are sent to investigate. Mark Hardy was given a sedative right before his fight. Trish Murtaugh is presente
When Cole and Murtaugh investigate a case involving a father and daughter (illegally) crossing the Mexican border, they end up uncovering a major issue with California Border Patrol. Meanwhile, Trish prepares her campaign for D.A. and must face parts of her past, before they find their way into the media spotlight. Cole also confronts his past when he experiences flashbacks as a result of an injury.
Against Murtaugh's advice, Cole reaches out to Tom Barnes to help with a case that hits close to home, putting Murtaugh and Cole's partnership to the test. Meanwhile, Trish prepares to announce her campaign for District Attorney.
Cole is investigated by the FBI, forcing Murtaugh to question his loyalty to his own partner; Cole works a case that puts Natalie's fiancé into the cross-hairs right before their wedding day.