The Destroyers was an unproduced pilot episode planned as a spin-off series for American television. The actual title of the proposed spin-off series is not known. It was written by Terry Nation, and was supposed to feature the Daleks and the Space Security Service. A synopsis of the episode was published in The Official Doctor Who & the Daleks Book in 1988. A notable aspect of the script is that one of the characters is Sara Kingdom, whom Nation had featured in The Daleks' Master Plan (along with other characters and concepts used in his aborted spin-off).