It’s the story of Raza Shar, a young second-generation British-Pakistani man from East London – who is coerced into turning informer for counter-terrorism officer Gabe.
His new boss, who has a past he wants to remain secret, is joined by Holly, his new and ambitious partner whose endless curiosity becomes a threat to him.
As the central counter-terrorism investigation heats up, the stakes for all three, their families and relationships, get higher and higher. Informer tells a story about identity in a world where lines are increasingly being drawn and sides are being taken.
Watch it on BBC One.