Even if you are not a Dr. Who fan, the story of its missing episodes is fascinating.
The Doctor Who missing episodes are the instalments of the long-running British science-fiction television programme Doctor Who that have no known film or videotape copies. They were wiped (or “junked”) by the BBC during the 1960s and 1970s for economic and space-saving reasons. There are 27 incomplete Doctor Who serials, with 106 of 253 episodes from the first six years of the programme missing. Many more were thought to be lost until copies were recovered from various sources, mostly overseas broadcasters.