Finn Wallace, London's most powerful criminal, is dead - and nobody knows who ordered the hit.

The taps are off for all gangs in London except Asif Afridi, so frustrated Kurdish gang leader Lale decides to hit a shipment of his cows that are being used to smuggle heroin. Elliot makes a connection with a key member of the Dumani family. Sean unleashes his fury after he makes a discovery about his father’s murder.

Lale is asked to make an impossible decision. Will she choose her homeland or her family? Sean enacts a dangerous plan. Elliot takes on a new foe. Ed is confronted with shocking evidence of Finn’s deal with Luan.

Elliot's loyalty is tested by an increasingly suspicious Ed Dumani. Sean throws a dinner in an attempt to unite the two families. Alexander is asked to meet with some of Finn’s old contacts.

Hidden safely away in a farmhouse in the middle of nowhere, Darren wrestles with the chaos he has unleashed. But when a mysterious group of mercenaries set their sights upon him, will Kinney be able to get there in time to prevent bloodshed?

With the Wallaces retreating to a safehouse, Marian puts the pressure on Sean to uncover Finn’s killer – and Sean wrestles with who he has become. How far is he prepared to go in pursuit of the truth? Meanwhile, Elliot’s recuperation is interrupted by a new danger.

The truth about Finn’s murder is revealed - and The Wallaces and The Dumanis will never be the same again. Meanwhile, Luan is forced to confront the deadly consequences of his actions. Elliot provides Vicky with enough information to make her move.

With the stakes higher than ever, the Wallaces are forced to go into hiding. Luan risks his life to rid himself of Mosi. Floriana seizes an opportunity. Elliot attempts to save the life of a colleague.

Old scores are settled. New alliances are forged. Lives are lost. Elliot is forced to make a choice that will define his entire future. And Sean makes a discovery about a traitor who has been in his midst all along.

A new ruling force is running London, but not everyone is happy with their methods and a rebellion is brewing.

Billy Wallace returns to London to seek revenge. Meanwhile, someone is picking off more of Koba's associates.

Marian Wallace is forced out of hiding and made to confront his past as Koba launches a terrifying helicopter attack on his enemies

As Luan faces a desperate race against time, Ed starts to question where his own loyalties lie, and events reach an explosive climax.

The pieces fall into place for Elliot as he tries to free himself of the Investors once and for all, but manoeuvres elsewhere threaten to derail him.

As alliances are redrawn, Lale comes face to face with nemesis Asif and enters into a dangerous game of cat and mouse.

In a thrilling penultimate episode, Elliot goes after those who have wronged him, but when his plan unravels, we see what Elliot is truly capable of.

As the series races to a climax, who will emerge as winner in the battle for control of London?

When Elliot's drug shipment is spiked, rocking the Gangs and causing hundreds of deaths, the hunt is on for who is responsible.

Sean, Billy and Cornelius make a drastic attempt to reclaim London, while Luan tries to take revenge and Elliot seeks answers.

Elliot's investigation puts him on a direct collision course with the Mayor. Marian decides whether to reunite with her family.

Luan takes drastic action to defend his family. Elliot uncovers a piece of the spiking mystery. But will it cost him everything?

As Lale faces a difficult choice, Asif is made an enticing offer and Marian discovers something that could impact her family.

A showdown between Elliot and Zeek leads to a shocking discovery. Has Elliot been looking for answers in the wrong places?

Elliot places his trust in a surprising ally to uncover the truth. Ed meets an old contact, as events build to a Gangs showdown.

The extent of the conspiracy is revealed. Elliot's past and present collide and the Gangs take revenge, changing London forever.