Maximilian Stael was originally going to commit suicide on-camera. This was cut for being too dark.
This episode was watched by 9.1 million viewers on its original transmission.
Stargroves house was used as Fetch Priory, and has had a long association with Rock and Roll. It was owned in the 1970s by Mick Jagger and was turned into a recording studio where The Rolling Stones, Led Zeppelin, Bob Marley, Deep Purple and many others recorded some of their big hits. It was later sold to Rod Stewart. It was also featured in another Tom Baker series, "The Pyramids of Mars".