Conversation so far:
What work did Terry Nation do on Doctor Who?
Terry Nation made a significant contribution to the long-running BBC science-fiction series Doctor Who.
What contributions did Terry Nation make to Doctor Who?
Terry Nation made a significant contribution to Doctor Who, creating the villainous Daleks.
What was the name of the Doctor Who villains created by Terry Nation?
The Daleks are a fictional extraterrestrial race portrayed in the British science fiction television programme Doctor Who. The Daleks were conceived by science-fiction writer Terry Nation.

Question: Did he state how he came to create these characters?
Self-contained rewrite: Did Terry Nation state how he came to create the characters of the Daleks?