Videos: Trailers, Teasers, Featurettes
The twenty-first season of British science fiction television series Doctor Who began on 5 January 1984 with the 5th Doctor serial Warriors of the Deep, and ended with Colin Baker's first serial The Twin Dilemma. For only the second time, the entire TARDIS crew changed over the course of a single season.
Streaming, rent, or buy Doctor Who – Season 21:
Currently you are able to watch "Doctor Who - Season 21" streaming on BritBox, BritBox Amazon Channel or buy it as download on Vudu, Amazon Video, PlayStation, Google Play Movies, Microsoft Store.