Full post on 3 x 30-minute festive ghost stories.

Post house: Ascent 142

Client: Tiger Aspect/BBC4

How it was done: Starting with a reduced colour palette, the stories move through Georgian England and the 1920s to the present day and each time the colour is enhanced. Shot in HD, it also used a Bolex 16mm film camera with a Vaseline filter to create warped and distorted images for flashbacks.

Watch it: 22, 23, 24 and 27 December on BBC4