The new series of Doctor Who will see the Time Lord joined by his first openly gay companion. Bill Potts's sexuality will be revealed pretty much straightaway in her second line of dialogue when the show returns to BBC One on 15 April. "It shouldn't be a big deal in the 21st Century. It's about time isn't it?" Pearl Mackie, who plays Bill, told the BBC. "That representation is important, especially on a mainstream show." She added: "It's important to say people are gay, people are black - there are also aliens in the world as well so watch out...