Written by Johnny Byrne, a plot outline for this story, also known as "The Place of Serenity", was submitted to the production office by Byrne in July 1983. The two-part story would have seen the Doctor visit the planet Serenity, which is part of the same union that Traken belonged to. The rulers of Serenity are assisted by a computer known as Prophecy and the villains of the piece, Auga and Mura, are attempting to overthrow the rulers. The story also would have seen the return of the Melkur. It was later adapted by Jonathan Morris for Big Finish as part of their "The Lost Stories" series in May 2012.