In a universe of infinite possibility, why is Doctor Who always a man? Peter Capaldi's forthcoming retirement from the role means it's surely time to hand the sonic screwdriver over to a woman.
Everyone's favourite BBC sci-fi show is sometimes held up as a model of regional development in television. Don't believe it.
Big heritage shows facing the tyranny of diehard fans can end up taking no risks. The story of how the 12th Doctor's screen credits came about is an object lesson in how to turn this around.