sentences:  The story was scheduled to be the finale to Season 7 but due to Wright taking an academic writing post in Bristol, he was unable to script it so the story was abandoned.Written by Charlotte & Dennis Plimmer, this seven-part story was submitted to the production office 10 November 1969.It was seriously considered as the final story of Season 7 after "The Mists of Madness" was cancelled, but a pay dispute with the writers saw the story being dropped.