The name of the episode is a pun based on the fact the TARDIS lands at World's End, in Chelsea.
This was the first story to be produced at the new Riverside Studios, the production team having moved from Lime Grove Studios.
This episode takes place in London in the 2160s.
The original script included a teenaged rebel named Saida, an English girl of Indian descent who was revealed as Dortmun's daughter after his death. Saida stowed away aboard the TARDIS at the story's conclusion, becoming the new companion. Subsequently, this character evolved into the Caucasian Jenny.