The Line of Duty star plays against type in this horribly realistic thriller about a family stalked by their neighbour. The hell they face will claw unbearably at you

Fear opens with someone being carried out of a rather gorgeous house in a rather unprepossessing body bag. As is now traditional for all television dramas, we then flash back to find out how things went so terribly wrong.

So, the plot proper begins when a family moves excitedly into the property, a historically significant townhouse in the posh West End of Glasgow, as befits the successful architect Martyn (Line of Duty’s Martin Compston), his research scientist wife, Rebecca (Anjli Mohindra) and their two children. They own the whole thing apart from the basement flat, where a man called Jan (Solly McLeod) lives. He has left them a welcome note on the mat – “Here’s to good neighbours.”