Terrell Parker, an LAPD press officer, sees his cousin, a rap artist shot by an assassin. His life saved only by the appearance of Sammo and Louis. Terrell tries to get himself involved in the investigation by partnering up with Sammo. Between them they uncover a CD bootlegging operation.

Sammo discovers that a legendary gangster and drugs dealer has left Colombia and come back to Los Angeles, looking for his ex-wife and son.

A corrupt councilman demotes Sammo and Terrell. Meanwhile, a gang war erupts, wrecking the plans of an L.A. mobster who wants to bring a pro-football team to L.A.

Sammo and Tyrell go to a prison to pick up Anton Trimble, the highest ranking Scorpio member ever captured alive. Scorpio tries to rescue him and show off their new weapon at the same time. They use an EMP weapon to disable all the electronics in the prison and the surrounding area. Sammo and Tyrell escape with Anton and are chased by a group of Scorpio agents. Meanwhile Grace is trying to find a way to get into Scorpio via her links with Kyle Strode.

Sammo and Terrell pursue a sweatshop proprietor suspected of selling babies.

A mild mannered man, with no criminal record, walks into an office and kills the man inside. When Sammo catches up with him he nearly kills him as well, with martial arts skills. According to his wife he didn't even know any martial arts skills. Tyrell's ex turns up with stories about her becoming a werewolf on full moons and going out and stalking someone. Are there any connections between these two occurrences? The MCU soon begins to think there is and start investigating.

A group of robbers, all dressed up as Santa, hold up a toy store and get away with all the new Armando toys that had just arrived. Amy discovers that they, along with shipments of toys at the two other stores that have been robbed in the last few days, all came from the same lot number. Surmising that the robbers are after something inside the toy rather than the toy itself they investigate the toy firm and stake out other stores to find out what the thieves are really after.

The MCU discover that Scorpio began in Shanghai and has a personal grudge against Sammo. 'The One' steps up his campaign to kill Sammo by first dealing with his friends and family. He already has his son as a member of Scorpio and next he kidnaps Amy and her fiancé and buries them alive in their limo. Sammo, Grace and Tyrell have to find out where Amy is before he targets the next one of them.

Sammo and his colleagues try to discover the whereabouts a group of White Supremacists armed with heavy weapons.

Sammo and Tyrell try to nail an illegal animal trading and hunting ring.

Sammo and Tyrell are working undercover with some jewel thieves when they are attacked by another group of, heavily armed, thieves. They attack their own comrades and join the new gang so that they can find out who they are, and who they are working for. The new gang specialises in robbing other gangs of criminals which leaves Sammo and Tyrell in a dangerous situation. The MCU have no idea where their two fellow officers are or what they are up to.

Sammo ends up looking after a dog after his owner is found murdered. While investigating the murder Sammo is attacked and the men try to grab Homer, the dog, in the process. The MCU team decides that there is more to this dog then first seems apparent and decide to find out as much as they can about it and his owner, Mason Talbot. They hope this will lead them to the reason for his death and who murdered him.

A new designer drug hits the street. It is called 'Thrill' and it breaks down your inhibitions and imbues you with a euphoric sense of invincibility. Sammo and Tyrell have to deal with a gang of 'Thrill junkies' when a traffic jam they are in is attacked. They stop the gang but Sammo's leg is broken in the process. He ends up in the same hospital as Ludlow Teale, the government's chief negotiator for the Middle East. Kyle Strode returns to town and Grace continues trying to get inside his organization so that she can find Lone Wei. The MCU investigations reveal that Scorpio has something to do with 'Thrill' and they plan a major operation to show it's potential.

The Governor's daughter is waiting in hospital for a heart transplant. Sammo is an old friend of the Governor, they met when they were both in China, and Sammo's job in LA is down to him. The heart is stolen when the ambulance transporting it is attacked and the Governor soon receives the inevitable ransom call. If he doesn't sign pardons for three serial killers then his daughter will never see the heart. The governor decides that his daughter is worth more than his career and signs the pardons, hoping that Sammo and the MCU can catch the criminals before they start killing again!

Scorpio implements its plan to control the world by causing a randomly picked plane to crash. They know that they can now effect any plane, anywhere in the world and the governments of the world will soon be at their control. Meanwhile the MCU tries to find out where 'The One' is running his operation from. Sammo has a chance to capture his son but decides to give him the chance to choose the right path and lets him go.

Winship discovers that his niece is involved with a Triad gang and assigns Sammo and Tyrell to track her down. Terrell is now part of the department.

Billy Rafferty, Terrell's former partner is found murdered. Terrell and Sammo investigate the last case he was working on, working undercover at a racetrack.

Grace and Tyrell take a flight escorting some of the worst criminals known to a maximum-security prison. One of the guards pulls a gun on the pilot and forces him to fly below radar level and then releases the convicts. The leader is a man Grace helped put away for murder and he wants to get revenge on her almost as much as he wants to complete his plan for a major crime. The MCU start to discover what he is up to and find that his plan is more audacious then they could have imagined.

Having not taken any time off for two years Sammo is told that he has to take a week off. It doesn't take him long to go stir crazy and he offers to help his neighbor, just out of hospital, by driving his cab for him. Meanwhile the rest of the MCU are involved in looking for a jewel thief and the murderer of a Marine Biologist.

A new generation of spy satellite crashes down to earth in downtown LA. The FBI tells Amy that the only missing piece is extremely radioactive. If it is opened it could irradiate half the city. Involved in the bringing down of the satellite are the criminal cult Scorpio and their mysterious leader 'The One'. FBI agent Wick insists that Sammo and Grace are not to be allowed to participate in the case because they are both Chinese nationals and are probably Chinese spies. While this is going on Sammo is also trying to track down the whereabouts of his son, Lone Wei.

With the help of a federal agent Sammo and his fellow officers go after a gang who are counterfeiting money.

A gang threatens the supermarket owned by Terrell's mum and step dad. He decides that he is going to help them out and enlists Sammo to aid him.

A biological virus is unleashed in a police precinct and the whole station is quarantined. Sammo and Tyrell investigate a student who stole the virus from his university by injecting it into himself. While they try to find out where the virus and vaccine is, and who is behind the outbreak, Amy and Grace find themselves quarantined in the MCU precinct when it to is attacked.

Sammo uncovers a diamond counterfeiting and smuggling operation ran by a major Chinese criminal, Lee Hei.

When fighters start dying in an Internet based all-in-fighting competition the LAPD are called in. Louis goes undercover to see whether or not the fighters are being murdered