In London, the Wallace family hold court as the leaders of the city’s most powerful crime family – that is, until their leader, Finn Wallace is suddenly killed after 20 years as the head.

With no one able to figure out who committed the crime, it doesn’t take long for rivals and snakes to swoop in and stake their claim on the city, with the whole underworld threatening to be torn apart with the efforts.

With enemies everywhere willing to take over, it’s now up to Finn’s eldest son, Sean, to take his father’s place and re-establish the Wallaces as a force to be reckoned with.

But Sean’s rise to power comes at a cost not just in the UK, but internationally, with dozens of criminal sects all feeling the effects of the new leadership.

And that’s before we get into the fact that an undercover policeman has managed to infiltrate the organisation unnoticed.

Gangs of London season one boasted an all-star British cast playing the gang leaders and members of the criminal underworld.

The main cast members are:

• Joe Cole (Skins, Peaky Blinders) as Sean Wallace

• Colm Meaney (Under Siege, Hell on Wheels) as Finn Wallace

• Lucian Msamati (Game of Thrones, Black Earth Rising) as Ed Dumani

• Sopẹ́ Dìrísù (Sand Castle, Criminal, The Huntsman: Winter’s War) as Elliot Carter

• Michelle Fairley (Game of Thrones, Suits) as Marian Wallace

• Brian Vernel (The Last Kingdom) as Billy Wallace

• Valene Kane (The Fall, The Winter King) as Jacqueline Robinson

• Paapa Essiedu (I May Destroy You, The Lazarus Project) as Alex Dumani

• Pippa Bennett-Warner (Roadkill, Chloe) as Shannon Dumani

• Asif Raza Mir (Samundar, Tanhaiyaan) as Asif Afridi

• Narges Rashidi (Anatomy of Evil, I Came By) as Lale

• Orli Shuka (All The Old Knives, War Machine) as Luan Dushaj

• Mark Lewis Jones (Baby Reindeer, Outlander) as Kinney Edwards

• Ray Panthaki (Marcella, Boiling Point) as Jevan Kapadia

• Jing Lusi as Vicky Chung

Find out more about the cast and characters here.

Season one of Gangs of London ran for nine episodes.

Find out more about how the season plays out with our episode guide here.

Sky is the home of Gangs of London in the UK.

All available episodes are free to watch on Sky Atlantic and NOW for our subscribers.

Season three is set to premiere in 2025 and will be available exclusively on Sky Atlantic and NOW, and will not be available on Netflix.

Gangs of London season one is nine episodes long, and starts with a sudden death that rocks the Wallace family to its core, forever changing its dynamic.

Finn Wallace is shot dead by a young Welsh traveller named Darren - who has no idea of what he’s just set into motion. With Sean assuming his father’s role, he quickly gets the ball rolling on a mission for vengeance, much to the hesitance of his advisor Ed Dumani, a long-time associate of his dad. Shutting down all criminal enterprises until the killer is caught, Sean immediately throws himself in the deep end.

As a list of suspects begins to grow, some men are slain in order to keep Finn’s secrets, and Darren’s father Kinney goes to extreme measures in order to ensure his safety.

Undercover policeman Elliot makes headway in gaining favour with the Wallaces.

Flashbacks reveal Sean’s dubious beginnings in the criminal world, as well as the promising future his older brother, Billy, showed to take over from his father.

However, in present day Billy is an outcast from the family business, having come out as gay and become a heroin addict, but is determined to win his position back.

Kurdish gang leader Lale finds a new source of heroin - which could cause issues with the drug cartel out of Pakistan.

Businessmen try to win over Sean into reopening the business practices.

Elliot finds himself connecting with an important person in the business, while Luan reveals a secret Finn had kept from his family to Ed.

Sean discovers the truth about his father’s death, and delivers his retribution.

The basis of Lale and Asif’s bitter hatred towards each other is revealed to be connected to life in Turkish Kurdistan.

Finn’s wife Marian discovers one of the secrets of her dead husband’s life - including another woman, who just so happens to live next to where he was killed.

Luan gets into a dangerous new business with Nigerian crime lord, Mosi.

Elliot’s loyalties begin to get tested as he gets closer to Shannon and her son, Danny.

Sean and Ed come up with plans to deal with Lale disobeying his order - with Sean leaving a bloody mess behind as a result.

Sean hosts a dinner party to bring the Wallaces and Dumanis together, and starts a new business with Lale.

Alex discovers the grim secret that Finn had been hiding from everyone, while his other secret - Floriana - is seen pregnant and captive in a basement.

Elliot’s handler, Vicky, receives a terrifying threat, while Elliot’s relationship with Shannon gets even deeper.

As suspicion grows around Elliot, Ed tests his loyalty to the family, which could threaten to expose his work as an undercover cop.

Ed and Alex continue to save face by entertaining the investors of Finn Wallace’s legitimate business, where it becomes clear they don’t see Sean as their new boss.

Sean’s life comes under threat with two attempts on his life, leaving many dead and others severely injured.

Told in a flashback in the timeline, Darren is taken to safety by contacts of his father, who make plans to get him out of the country.

In the aftermath of Sean’s actions, Traveller leader Kinney hides out, wounded but alive. But he has to keep his wits about him with Danish mercenaries on his and Darren’s tail.

With plenty of people now trying to track Darren down, Kinney goes on a one-man mission to try and reach him.

But who are the mercenaries actually working for, and what is it that they want?

Ed has to juggle a lot of information to make sure the business continues to run smoothly, and reveals a new plan to Alex which could make him head of the organisation.

Sean, his mother Marian, and brother Billy head to a safe house - alongside an injured Tove with whom they can extract information. Each has a different way of winning her over.

Meanwhile, Billy’s addiction withdrawal begins to see him suffer, and with the help of a friend, he gets his fix… leading to a foolish move that could also deliver crucial information.

Soon, the trio invite people over to the safe house, and Alex begins to come round to the idea of being the one in charge.

But soon he and Sean both must deal with a pretty big issue that makes them put their confrontation on the backburner.

Asif and Lale’s war reaches a bloody new level, prompting Lale to form a new alliance.

Elliot’s undercover mission begins to crumble as a secondary officer threatens to steal his limelight in the operation.

Mosi arrives in London looking for answers, and makes his presence known quickly to Luan and the London criminal underworld.

New revelations come to light about Finn and his plans for the future.

Ed and Alex are encouraged by investors to usurp Sean in the family business, leading to a vicious confrontation and showdown.

Sean and Marian go into hiding, as Dutch mercenaries try to hunt them down. Marian gets the upper hand in the police’s undercover operation, prompting Elliot to think on his feet.

Luan makes an attempt to ambush Mosi, but things spiral out of hand fast.

The Wallace family gets a new addition thanks to Floriana.

Alex continues to impress the investors, as Sean comes up with a reckless decision to blow up the entire company as they know it. Literally.

In the aftermath of Sean’s big move, the crime boss goes on the run as he becomes a publicly wanted terrorist. Elliot’s lies reach their dramatic climax. Jevan faces the wrath of investors, while Lale returns to Kurdistan.

Asif’s major step towards absolute power within London after a political move pays off, but his happiness is short-lived.

Marian and Ed come face-to-face, and Sean receives a number of visitors in his ‘secret’ location before the police descend.

Alex and Sean come face-to-face, Elliot is interrogated, and Marian finds an unlikely ally as the first series winds to a close.