Elements of the story were reused by Adams for his novel "Dirk Gently's Holistic Detective Agency", in particular the character of Professor Chronotis who possesses a time machine. Adams did not allow "Shada", or any of his other "Doctor Who" stories, to be novelised by Target Books. It is, therefore, one of only five serials from the 1963–1989 series not to be novelised by Target – along with Adams' other stories "The Pirate Planet" and "City of Death", plus Eric Saward's two Dalek stories ("Resurrection of the Daleks" and "Revelation of the Daleks").