A slightly unhinged cop is partnered with a veteran detective trying to maintain a low stress level in his life.
When Cole is investigated by the FBI, Murtaugh is forced to question his loyalty to his own partner. Meanwhile, Cole works a case that puts Natalie's fiancé, Andrew, into the crosshairs right before their wedding day.
Riggs, Murtaugh and Palmer gain inside knowledge of dangerous new cartel operations, but Riggs' attachment to Palmer worries Avery and Delgado. In other events, Trish contemplates a new career opportunity.
The squad is on high alert after an apparent threat is made on Riggs' life. With Murtaugh taking on more responsibility at work, he and Riggs have to deal with their changing relationship. Meanwhile, Trish gets caught up in some trouble and Molly asks Riggs to make a big decision about their future.Watch Now:AmazoniTunes
Riggs and Murtaugh are forced to work with DEA agent Karen Palmer again, to protect Leo Getz, an ambulance-chasing attorney who was linked to the Cartel. As the three delve further into the case, they begin to realize that Leo may not be the only one with a target on his back. In the meantime, Riggs begins to view Agent Palmer in a new light while Murtaugh is left worried after Trish makes a spontaneous decision
A brutal car crash reveals that Cahill is the target of a murderous stalker, causing Riggs and Murtaugh to turn the tables and start asking her questions for a change. Meanwhile, after finding Murtaugh's file in Cahill's office, Riggs becomes obsessed with finding out about his past as Roger and Trish reel over their daughter's newfound fake ID.
Murtaugh delves deep into the psyche of a former navy seal who is wanted for criminal activity, and draws parallels between him and his partner, Riggs, who also served in the military. Riggs' connection to the suspect threatens to interfere with the case, but it also forces him to open up to Murtaugh.
Murtaugh follows Riggs down to Mexico, where he plans to avenge his wife's death and finish off Tito Flores once and for all. Once back in the States, they have a few people to answer to during the ongoing investigation around Flores, including Murtaugh's family. Meanwhile, Avery is questioned by Internal Affairs about the integrity of his department.Watch Now:AmazoniTunes
A noise complaint at a boxer's home leads Riggs and Murtaugh to a case involving illegal gun runners and Riggs becomes personally invested in the outcome when one of their targets reminds him of his late wife. Meanwhile, Trish worries about Murtaugh's health.
The whole precinct's holiday celebrations are cut short when they're called to examine a ruthless homicide linked to Eddie Flores (guest star Raul Casso), the deranged nephew of a notable drug lord who has a previous history with Riggs. The holiday season weighs heavily on Riggs, who flashes back to past Christmases with his former wife, Miranda. Murtaugh is also a little preoccupied with his neighbor's obnoxious holiday decorations.Watch Now:AmazoniTunes
It's Christmas time and the Murtaugh family is headed to Hawaii. However, Murtaugh's vacation is put on hold when he and Riggs are called to a homicide and the victim is an old friend. Meanwhile, Riggs gets a surprise phone call from a relative just in time for Christmas.Watch Now:AmazoniTunes
Murtaugh takes a family vacation, but is pulled back into work when he witnesses an alleged abduction. Cole is left to investigate a murder himself, but the two cases begin to intersect. Meanwhile, Erica's mother, Senator Malick, comes to town and stirs things up between Erica, Cole and the case at hand.
When a million dollar casino heist takes a deadly turn, Riggs befriends the only credible witness, an eight-year-old boy, and takes him into his care. Murtaugh pulls some dangerous stunts in an attempt to prove to everyone that he can be a motorcycle guy. Riggs contemplates what to do with the money he received from selling his home in Texas.
Riggs and Murtaugh respond to the death of a plastic surgeon, drawing them into a case involving an illegal drug ring run out of a wellness clinic. Things heat up when Palmer from the DEA and Riggs compete to solve the case first. Meanwhile, Trish and Murtaugh face the emotional challenges of sending their first son, RJ, off to college
Riggs and Murtaugh look into the murder of one of L.A.'s fashion expeditors and discover an underground DEA operation. In other events, with Trish and the kids away, Murtaugh goes on a "bender"; and Riggs has all-too-real dreams of Miranda.
A string of burglaries hits close to home for Murtaugh when one occurs in his own neighborhood, and it gets just as personal for Riggs when another break-in ends in a casualty. Meanwhile, Roger Junior connects with an old friend who might be twisted up in some criminal action of his own.
Murtaugh and Riggs square off with the L.A. Sheriff's department when their investigation into the death of a Texas Ranger leads them to a possible misuse of power. The case also surfaces a dark secret from Capt. Avery's past.
When Detective Bailey's sister, Jess, runs into trouble with the law, Bailey must decide how far she's willing to go to protect her family. Meanwhile, with Trish away on a company retreat, Murtaugh is left to help Riana navigate boy problems, and Riggs deals with the fallout of a night of heavy drinking.
Riggs is reunited with childhood friends and comes to realize they might be mixed up in the robbery-homicide case he and Murtaugh are investigating. Meanwhile, Murtaugh finds a joint stashed in his kitchen that he brings to Scorsese for testing in effort to bust one of his kidsWatch Now:AmazoniTunes
When Riggs and Murtaugh investigate a high-profile case surrounding the murder of a young model, they uncover a vicious secret behind the locked mansion gates of one of LA's wealthiest families. Riggs gets a jolt from his past when he discovers that an old friend of his wife has ties to the case. Murtaugh is shocked to hear that his daughter is sending promiscuous photos to her new boyfriend.
Murtaugh and Riggs investigate the mysterious death of famous singer Shaye's bodyguard. Murtaugh turns to his daughter, a fan of the singer, to learn more about Shaye's background and uncover the possible suspects. Meanwhile, Riggs learns the responsibilities that come with being in a relationship with help from Murtaugh.
Murtaugh and Riggs respond to a robbery that took place 20,000 feet in the air. The investigation turns into an ongoing hunt for an unreliable father, with his daughter being their main witness. Meanwhile, Murtaugh faces hostility from his own daughter, Riana, as he tries to connect with her.
When a car containing massive amounts of cocaine is stolen from an impound lot, Riggs and Murtaugh become embroiled in a notorious car theft ring. Meanwhile, Murtaugh experiences some frightening chest pains. If Riggs' driving isn't enough of a trigger, the lead defense attorney on the case is none other than the terrifyingly brilliant Trish Murtaug.
A murder involving a high school football star draws Riggs and Murtaugh into the lucrative and corrupt world of college football recruiting; Murtaugh considers a change in his professional life; Riggs spends more time with Karen Palmer.