No complete stories from the season were known to have survived until the early-1990s when archivists recovered a complete version of The Tomb of the Cybermen. A second complete story, The Enemy of the World was recovered in 2013, along with a nearly complete recovery of the story that followed it, The Web of Fear. The season is also notable for having Patrick Troughton play a double-role as both the Doctor and Salamander in The Enemy of the World.
