A host of stars enter the weird and wonderful world of Steve Pemberton and Reece Shearsmith, as the razor-sharp double act serve up a festive helping of their quirky anthology series.

Ahead of a new run next year, tonight’s special sees Steve, Jessica Raine and Rula Lenska playing the leads in a 1977 film about Krampus, the scary, mythical beast who punishes naughty kids at Christmas.

But it’s not long before fiction edges alarmingly towards reality… A brilliantly unpredictable half hour.