Ash seizes his chance to bring down the serious criminals in a new undercover unit.
2 -Episode 2 52 min
Guns are flooding the streets - can the Unit stop them before more people are killed?
3 -Episode 3 52 min
A bag of dirty money could lead the team to a top criminal, but there's a price to pay.
4 -Episode 4 52 min
The team race to find a dangerous new supplier before his drugs flood the streets.
5 -Episode 5 52 min
The death of a young girl alerts the Unit to a batch of lethal pills.
6 -Episode 6 53 min
A notorious armed robber arrives in town, and Ash's past catches up with him.
7 -Episode 7 52 min
Ash returns to work at a low ebb following his violent encounter with Yorkie.
8 -Episode 8 53 min
As the drama draws to a thrilling close, what will Ash need to sacrifice to conquer Roach?
Marcus Ashton is a law enforcement officer who takes crime personally. He's committed and uncompromising in fighting it on the same streets where he grew up. After 15 frustrating years of low-level drug busts, he finally sees a chance to fulfil his dream of taking down the underworld's biggest players when he is recruited by the UNIT (Undercover Narcotics Intelligence Team). Using state-of-the-art surveillance, this highly skilled and determined squad are single-minded in their mission to hunt down and bring to justice London's most ruthless criminals.