Written by Bafta award-winning writer Peter Moffat (Criminal Justice), the six-part series stars Rupert Penry-Jones (Spooks) as Clive Reader, Maxine Peake (Shameless) as Martha Costello, Neil Stuke as Billy Lamb, Tom Hughes as Nick Slade and Natalie Dormer (The Tudors) as Niamh Cranitch.

Episode 1 airs at 9pm tonight on BBC One.