A 16mm film print of this episode, originally transmitted by RKTV, was located in the Nigerian town of Jos during 2012; it was, however, found to be badly decomposing and thought unsalvageable. However, teams from BBC Research and Development and the dental X-ray department of Queen Mary University, London worked together over 2015-22 to see if any images were recoverable. What they could recoup from dissecting and scanning the block of film, then digitally dewarping the pictures, has been married to the surviving soundtrack to present a continuous episode.