Detailed Instructions: Generate a correct and concise answer for the question based on the words in the context.
Problem:Context : Revenge of the Cybermen is the fifth and final serial of the 12th season of the British science fiction television series Doctor Who, which was first broadcast in four weekly parts from 19 April to 10 May 1975.
Question : Which series is Revenge of the Cybermen apart of?
Solution:
Doctor Who