A temporada 1 de The Shadow Line começou em BBC Two em jeudi 5 mai 2011, esta é a época actual, inclui de momento 15 episódios.
From the cop with a bullet in his brain, whose amnesia leaves him doubtful of his own moral compass; to the drug-lord driven by a profound personal tragedy, risking it all on one last deal; to the brilliantly lethal puppet-master who gradually emerges from the shadows to bring the story to its shocking climax – The Shadow Line explores the morality of these characters as they negotiate the repercussions of Wratten's death and attempt to navigate the fine line between right and wrong...