Doctor Who Season 10 Companion Trailer Meet Bill
When Doctor Who first premiered in 1963 there was a main cast of four people. The Doctor, the teenage Susan, and her teachers Barbara and Ian. While much is made of how The Doctor regenerates when he dies, to be played by a new actor every few years, the companions change too. In fact, all three of The Doctor’s original companions left the show in the second season, well before Hartnell was replaced by Patrick Troughton....