Respected police officer John River, a gifted cop with a troubled mind, struggles to come to terms with the recent loss of a colleague, and chases a suspect across London - with tragic consequences. Now at odds with the authorities, River ends up in a precarious position as he seeks to bring closure to the mother of murdered teenager, who blames him for failing to keep his promise.

• Stellan Skarsgård
• Nicola Walker
• Adeel Akhtar
• Lesley Manville
• Owen Teale
• Georgina Rich
• Eddie Marsan
• Turlough Convery