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.