The main location for the set where the horror film is being made is the National Trust's Coughton Court, a Tudor country house near Alcester in Warwickshire.
In much the same style as the horror film being made in this episode, The Mask of the Demon is the English title of a classic 1960 Italian horror movie, La Maschera del Demonio, although it is also known in English as Black Sunday.
In a nod to women directors, Muriel Box is mentioned. She directed 15 films, mostly in the 1950s. She was also a screenwriter, and later in life she became a novelist and founded a successful feminist publishing house, Femina.