This is one of the few serials in which the ending credits have been changed from the regular credits. Adric's star-shaped badge for mathematical excellence is shown broken in pieces while the credits roll in silence. It is the only story in which the main theme is not used in the credits.
Eric Saward considered having the Cyber-Leader survive the story, as another example of the Fifth Doctor's fallibility compared with his predecessor, but decided against it.
John Nathan-Turner got the idea of the end credits rolling silently over Adric's shattered badge from an episode of Coronation Street (1960).
This is the first episode since The War Games: Episode Ten (1969) to feature rolling credits. They would not be seen again until Rose (2005).