Season 1 | Episode 1 A slightly unhinged widower and former Navy SEAL lands a job as a police officer in Los Angeles where he is partnered with a veteran detective who is trying to maintain a low stress level in his life.
Season 1 | Episode 2 Murtaugh and Riggs are sent to deal with a noise complaint at a party. And when they arrive there are shots fired. They chase the shooter only he was killed. They go back to the Captain who is with an ATF agent who tells them the weapon that was used is strictly for military use, which means someone got their hands on some and are trying to sell it. Riggs upon looking over what happened doesn't think the one who was killed is the target. They think it's someone else, a woman.
Season 1 | Episode 3 Riggs and Murtaugh follow a violent case involving a drug cartel, theft, two killings and, unfortunately, Murtaugh's old T.O., Ned Brower. As the case unfolds, it turns out that Ned is more involved than just driving the cash, which leaves Murtaugh with an inevitably dangerous decision to make. Looking for back-up, the duo turns to Cruz for help. In the midst of all the chaos, Riggs continues to depend on outside vices, rather than face the reality of Miranda's death, while Murtaugh and Trish struggle to find alone time. Miranda Riggs appears as a vision to Riggs early in the episode and at the very end he remembers walking up to her parents home with her for the first time.
Season 1 | Episode 4 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.
Season 1 | Episode 5 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.
Season 1 | Episode 6 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. Back at home, Murtaugh is shocked to hear that his daughter is sending provocative photos to her new boyfriend.
Season 1 | Episode 7 As Riggs and Murtaugh examine the murder of one of L.A.'s fashion expeditors, they follow a trail of evidence that leads them to an ongoing and exceptionally dangerous underground investigation led by the DEA agent Karen Palmer (Hilarie Burton). In the meantime, Trish and the kids are off visiting colleges, leaving Murtaugh to a "bender" of his own, while Riggs has trouble sleeping through the night due to his all-too-real dreams of Miranda.
Season 1 | Episode 8 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. On the flip side, Murtaugh pulls some dangerous stunts in an attempt to prove to everyone that he can be a motorcycle guy. Meanwhile, Riggs contemplates what to do with the money he received from selling his home in Texas.
Season 1 | Episode 9 The whole precinct's holiday celebrations are cut short when they're called to examine a ruthless homicide linked to Eddie Flores (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 Christmas with his former wife, Miranda. Murtaugh is also a little preoccupied with his neighbor's obnoxious holiday decorations.
Season 1 | Episode 10 Riggs and Murtaugh end up in the middle of a turf war as they investigate the murder of a millennial "designer drug" dealer.
Season 1 | Episode 11 Riggs and Murtaugh are pitted against the LA Sheriff’s department.
Season 1 | Episode 12 Riggs and Murtaugh get involved with a notorious auto theft ring after a car containing a large amount of cocaine is stolen from the impound lot.
Season 1 | Episode 13 Riggs and Murtaugh investigate a series of violent crimes targeting members of the same church; the anniversary of Miranda's death weighs on Riggs; Trish and Roger butt heads with R.J.
Season 1 | Episode 14 A car crash reveals that Cahill is the target of a murderous stalker; Riggs finds Murtaugh's file in Cahill's office and becomes obsessed with finding out about his past; Roger and Trish discover their daughter has a fake ID.
Season 1 | Episode 15 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.
Season 1 | Episode 16 A murder involving a high school football phenomenon draws Riggs and Murtaugh into the lucrative - and corrupt - world of college recruiting. Meanwhile, Murtaugh considers a big change in his professional life, and Riggs contemplates an even bigger shift in his personal life, as he spends more time with DEA Agent Karen Palmer.
Season 1 | Episode 17 Riggs and Murtaugh team up again with DEA Agent Karen Palmer, and together they gain inside knowledge of dangerous new cartel operations. As Riggs' attachment to Palmer deepens, so do his impulsive actions, further worrying Captain Avery and Delgado. In the meantime, Trish explores the potential of an amazing new career opportunity.
Season 1 | Episode 18 After making a startling discovery that pertains to Miranda's death, Riggs heads to Mexico and the cartel in search of answers. Worried about Riggs, Murtaugh is seen driving into the night to Mexico.
Season 2 | Episode 1 Murtaugh intercepts Riggs just as he is preparing to shoot and kill Tito Flores, the drug lord responsible for Miranda's death. He convinces Riggs to bring Tito back to the U.S. alive, in the trunk of Murtaugh's car. When they prepare to turn Tito over to U.S. authorities, however, they open the trunk and discover Tito has been shot in the head and killed.
Season 2 | Episode 2 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. The case has Riggs reconnecting with Agent Karen Palmer, who has been given desk work at the DEA ever since she leaked the Tito Flores file to Riggs. Karen, blind-sided by her greed to get out of the desk work, hijacks the investigation by interfering with Riggs job only to realize that she is not as efficient as she thinks she is. Begrudgingly, she blames Riggs for it. Riggs, knowing her ego, says he is sorry even though he knows that it was not his fault. Elsewhere, RJ is packing for college and seems reluctant to live on campus, until he learns that his dorm building is co-ed, which then has dad and mom concerned.
Season 2 | Episode 3 Riggs and Murtaugh, along with young detective Zach Bowman (Andrew Creer), investigate when the bodyguard of famous pop singer Shaye (Joanna Levesque) is murdered. The detectives uncover a secret relationship between Shaye and the bodyguard, along with an even bigger secret in Shaye's past. Meanwhile, Riggs and Palmer struggle to find normalcy in their relationship.
Season 2 | Episode 4 A lifelong con man (Adrian Pasdar) robs the passengers on a private plane at gunpoint while it is airborne, then leaps out with a parachute, taking a victim with him. Riggs and Murtaugh learn that the con man is dying and wanted one last haul to help his daughter after he's gone, but one stolen item (a briefcase full of uncut diamonds) has attracted a group of violent criminals. Meanwhile, Santos questions Avery's ability to lead, given his top detectives' penchant for danger.
Season 2 | Episode 5 Riggs and Murtaugh investigate a death that occurs moments before the victim's bet wins a horse race. The victim is Howard, a friend of Leo Getz. While it appears that Howard had a stroke, Getz is convinced it's murder, which Scorcese later proves to be true. Meanwhile, the city tows Riggs' trailer off the beach, bringing back painful childhood memories of being evicted.
Season 2 | Episode 6 Riggs helps his childhood friend Jake (Linds Edwards) get paroled from prison, but it soon becomes apparent that Jake is up to no good again. Noticing that Riggs gives Jake a lot of leeway, Murtaugh asks his partner if he owes his old pal a favor. Elsewhere, Murtaugh tries to find out which of his family members left a marijuana joint in a package of cookies, while Bailey gives Bowman a hard time just because he rejected her after she accidentally sent him a sext.
Season 2 | Episode 7 Riggs and Murtaugh work on the case of a dead surfer who just came into town from San Diego the day before. Bailey and Bowman help, and Bailey wonders why Bowman is treated like a hero in the beach town. Meanwhile, Murtaugh becomes suspicious of Trish's relationship with her charity ball co-chair "Scott", until he learns it is ex-NBA star Scottie Pippen. Also, Riggs deals with recurring nightmares.
Season 2 | Episode 8 Riggs and Murtaugh investigate a murder involving a couple and a New York mobster, Frank Truno. Scorsese reveals a movie script he has been writing, after he found out that the case revolves around the mafia. However, Murtaugh dislikes the way Scorsese accurately portrays him as one of the characters. Meanwhile, Riggs is taken aback when his childhood friend Molly (Kristen Gutoskie) suggests that they could have been romantically involved.
Season 2 | Episode 9 Jonah (Derek Richardson), a man with schizophrenia who believes that Elvis Presley is alive and controlling Hollywood's traffic, is running away from Riggs and Murtaugh after being suspected of murder. However, when he proves his theory, Riggs and Murtaugh must stop an organized heist conducted by men dressing as Presley. At the same time, Murtaugh tries to get his daughter into at an esteemed pre-school and Riggs gets scared when his relationship with Molly becomes romantic.
Season 2 | Episode 10 Murtaugh is ready for his family holiday in Hawaii until Diego, a young man he once helped, is murdered. Riggs and Murtaugh confront Grant Davenport (Martin Donovan), the president of an American upper class club where Diego was employed, who has ties to the Aryan fraternity. However, their confrontation causes the fraternity to ambush both of them. Murtaugh manages to subdue his attackers, but Riggs is only able to escape because of his father's assistance.
Season 2 | Episode 11 Riggs and Murtaugh take on a counterfeiting ring and are joined on the case by veteran Secret Service Agent Peterson (Ernie Hudson). A group of three teenagers inadvertently get involved when they witness a shooting and run off with the phony cash and plates. One of the teenagers named Ty (Nathan Davis Jr.) strikes a chord with Riggs after revealing he's homeless. Meanwhile, Riggs brings home a dog for Ben and Molly. Molly later finds the dog dead with its neck snapped. Sensing it's a message from his father, Riggs goes to confront him in prison. Also, Roger and Trish learn that RJ has been cutting classes at college.
Season 2 | Episode 12 Shortly after Gene Nakahara (C.S. Lee) meets with Trish and an uninvited Leo Getz to announce he is running against Councilman Sean O'Brien (Michael Reilly Burke) for Mayor of Los Angeles, Gene is killed when his car blows up. Riggs and Murtaugh learn of a private investigator named Serrano (Tim Kang) who works as a "fixer" for high-profile people and investigate that angle, while Trish and Leo work behind the scenes to reveal skeletons in O'Brien's closet. Riggs also learns that his late wife Miranda once visited Serrano to get info on Riggs' father.
Season 2 | Episode 13 Dr. Cahill begins to question her abilities when two patients of hers die in separate incidents, until it is learned that they were briefly roommates in the same psych facility. Riggs and Murtaugh uncover corruption in the facility related to the medications both patients were taking. At the same time, Santos (Michelle Hurd) learns that Riggs had an anger incident caught on tape in which he destroyed the deputy mayor's car, and requests that Cahill sign an affidavit confirming that Riggs is still fit for duty. Elsewhere, Trish and Roger see that RJ has become depressed and withdrawn after dropping out of college, and decide to take their son to a therapist.
Season 2 | Episode 14 Detective Bailey's younger sister Jess (Alisha Wainwright) inadvertently gets caught up with a drug mob when she and her boyfriend use her waitress position at a high-end night club to steal a man's wallet. After the boyfriend is killed over the wallet's contents, Bailey walks a thin line between her obligation to the law and protecting her sister. Elsewhere, Murtaugh helps Riana spy on her boyfriend, whom she accuses of cheating, while Riggs loses his truck after a night of heavy drinking.
Season 2 | Episode 15 A elderly drifter named Ruthie (Swoosie Kurtz) is present at a jewelry store robbery, and becomes a key witness in the case. In the process, she and Riggs, who has recently vowed to stay sober, bond over their alcoholism. Meanwhile Murtaugh, fresh off being called "grandpa" at the playground while with his toddler, starts acting like Riggs and takes dangerous risks to prove he's not getting old. This gets him on Trish's bad side.
Season 2 | Episode 16 Riggs and Murtaugh track a group of criminals who stole numerous guns during a shoot-up at a police buy-back event. They locate and capture the group's leader, Booker (Sheaun McKinney), only to learn that he's working undercover for ATF. Avery learns from Booker's boss that Booker is a bit of a loose cannon, much like Riggs. Meanwhile, Riggs learns a little more about Ruthie's past and family situation, as Roger and Trish continue to fight at home.
Season 2 | Episode 17 With Riggs trying to get Murtaugh to make up with Trish and get out of his trailer, the two only make things worse when they ruin a public building implosion for Trish's latest project. An angry Trish tells the two that her client, grocery store magnate Henry Butler (Michael McGrady), now wants to bail on the project. Riggs convinces Butler to stay in town by inviting him to dinner. Riggs and Murtaugh discover that Butler is the man behind the murder, and Trish eventually also learns that her client is dirty. This leads to a wild adventure when Riggs and Murtagh board Butler's private jet as he's trying to flee. Later on, Riggs confesses that he wants more out of their relationship, but Molly insists that Riggs must first resolve the issues with his father.
Season 2 | Episode 18 About 16 years ago, Frankie Kelso (Jude Ciccolella), a contract killer, decided to show mercy on Murtaugh after the latter tried to arrest him at the scene of a hit. In the present, Murtaugh notices Kelso's signature at the scene of another killing. He captures Kelso, but the latter is able to get the upper hand and take Murtaugh hostage. Kelso insists that he is retired and that someone framed him for the recent crime. Riggs recognizes the name of one of Kelso's mob connections as someone who spent time in prison with his father, Nathan (Rex Linn). Riggs then reluctantly contacts his father to get the information he needs to save Murtaugh. However, his action caused the mobs to declare war on Riggs' father by attacking him in prison.
Season 2 | Episode 19 Leo is getting married to Nina (Shakira Barrera), an ex-con, but she bails on the day of the wedding. Riggs and Murtaugh find her with a group of criminals trying to unload a bag of cocaine that "fell into" her purse at a high-stakes poker game run by a known mobster. At the same time, Riggs learns that Molly met with her ex-husband Jake, who is still a fugitive, and that Jake was at the same poker game. When Riggs catches up with Jake, the latter reveals he is planning to rob the safe at the poker game with two other conspirators. Elsewhere, Murtaugh is distraught over finding a positive pregnancy test in the trash can outside his home.
Season 2 | Episode 20 A break-in at a mansion turns deadly, and Roger and Trish are surprised to learn that Riana may be involved. It turns out that Phoebe, the sister of Riana's new boyfriend Jesse (Daniel DiVenere), is in possession of stolen diamonds from the heist and has become a target. Meanwhile, Riggs tries to be a good father figure for Ben, as he recalls the things he and Molly discussed in their teen years.
Season 2 | Episode 21 With Avery away at a conference, Murtaugh is appointed interim captain. His first case involves the kidnapping of Lisa Conlon, wife of a pharmaceutical magnate. Riggs is forced to get his father involved when its revealed that the Aryan Fraternity of Texas (AFT) is behind the crime. In the process, Riggs learns that he has a 19-year-old half-brother, Garrett (Peter Coventry Smith), who is assisting the AFT. In exchange for his help, Riggs' father is let out of prison early. His comments to Riggs suggests that he plotted the whole kidnapping to get an early release. Meanwhile, Commissioner Debra tells Murtaugh that he is being promoted to full-time captain, as Avery will not be returning.
Season 2 | Episode 22 While Murtaugh visits Riggs, the latter's trailer is shot up by two men on motorcycles. The investigation leads back to Grant Davenport where Riggs and Murtaugh discover that Riggs' father is the former's bodyguard. Later on, a suspect tells Riggs that Murtaugh was the target of the shootout and Trish's senior partner in her workplace has been laundering money for the AFT. Riggs' father immediately kidnaps Trish. Riggs and Murtaugh release Riggs' half-brother, Garrett, to exchange him for Trish. During the exchange, Murtaugh manages to save Trish, Riggs kills his father and Garrett escapes. Afterwards, during a celebration party, Riggs tells Trish that he is moving back to Texas with Molly and Ben. However, as Riggs makes one last visit to his wife's grave, Garrett shows up and fatally shoots him in the chest.
Season 3 | Episode 1 Following a harrowing experience in Afghanistan, 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' death and is considering retirement. Following the successful capture of the criminals, Cole learns that Murtaugh recommended him for the position of homicide detective.
Season 3 | Episode 2 Shortly after they get their first case involving the murder of a banker thought to be at the hands of South American drug lords, Murtaugh thinks partnering with Cole was a mistake. 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 Nathan Riggs. Meanwhile, Cole learns that his ex-wife is in a relationship, and he has a hard time seeing another man in his daughter's life.
Season 3 | Episode 3 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.
Season 3 | Episode 4 Cole and Murtaugh look back on past mistakes as Leo Getz returns as the attorney on their latest case.
Season 3 | Episode 5 A truck filled with fine art is robbed; Cole deals with lingering feelings for Natalie; Riana blackmails Murtaugh into letting her go to a concert after she catches him in a lie.
Season 3 | Episode 6 Cole confronts his past when his former mentor delivers alarming news, as he and Murtaugh investigate a robbery of safe deposit boxes. Murtaugh clashes with Trish's new client and enlists Bailey's help to investigate her.
Season 3 | Episode 7 Murtaugh turns to Cole's former mentor for help on a high-stakes cartel case. Murtaugh and Trish meet Natalie and Maya for the first time. Tensions mount between Bailey and 'The Gute' as the new partners begin to work together.
Season 3 | Episode 8 Cole wants to talk to Natalie about their relationship before it's too late, but a wrench is thrown in his plans after he bumps into a new ADA, Erica. After being kicked out of the house for Trish's girl's night, Murtaugh finds himself an unlikely friend.
Season 3 | Episode 9 While Cole gets into the holiday spirit for his first Christmas with Maya, Murtaugh hopes he can convince RJ to come back home from Costa Rica for the holidays. Cole and Murtaugh are saddled with a complicated burglary and home invasion case. Avery's holidays are a bit blue. Bailey is still trying to figure out her new partner.