As the fractured events of Stevie's murder start to swim into focus for River, the awful truth places more pressure than ever on his worsening state of mind. Can he carry on when so much is left unsaid?

Stellan Skarsgard (The Girl With The Dragon Tattoo) stars in this six-part series as John River, a brilliant police officer whose genius and fault line is the fragility of his mind - a man haunted by the murder victims whose secrets he must unlock, a man who walks a professional tightrope between a pathology so extreme he risks permanent dismissal, and a healthy state of mind that could cure him of his gift.