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.
John Nathan-Turner borrowed the idea of the closing credits rolling in silence from Coronation Street (1960). Which, in the soap opera, when a popular character died or was killed off, the closing credits would roll in silence.