The Loch (also known as Loch Ness) is a six-part British television drama series, created by screenwriter Stephen Brady, that first broadcast on ITV on 11 June 2017. The series follows DS Annie Redford (Laura Fraser), a small town police officer with the Scottish Highland Police as she investigates the murder of piano teacher Niall Swift, who is found dead at the bottom of a cliff in the picturesque village of Lochnafoy, Loch Ness. When it becomes apparent that part of Swift's brain has been removed, and a human heart belonging to another victim is found close by, Annie's team realise they are searching for a serial killer. In response, Glasgow based major investigation detective DCI Lauren Quigley (Siobhan Finneran) is brought in to lead the enquiry.