A murder is investigated by both sides of the line, cops and criminals, using opposing methods. But the real line is the morality within each person and how far they will go before they cross it.
Chiwetel Ejiofor
Christopher Eccleston
Kierston Wareing
Stephen Rea
Rafe Spall
Eve Best
Lesley Sharp
Richard Lintern
Robert Pugh
Antony Sher
Freddie Fox
Tobias Menzies