Throughout the first series of the new Doctor Who in 2005, the Doctor and Rose keep encountering references to "bad wolf" no matter where and when they travelled to. Who or what was the Bad Wolf?

Doctor Who announces reunion of Christopher Eccleston and Billie Piper after 20 years - ‘I don’t think my Doctor exists ...

Doctor Who stars Billie Piper and Christopher Eccleston are reprising their roles for a new audio series. Eccleston, 60, ...

Christopher Eccleston and Billie Piper pulled in a new generation of Doctor Who fans to follow his journey through time and ...