<P> 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 . </P>
<P> 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 . </P>
how many episodes in the loch season 1
how many episodes in the loch season 1
six
six