Re: 1 x 12 - Bad Wolf
He's referring to when they were there in "The Long Game". He just blew up the Jagrafess and left, which had the unfortunate consequences for the Earth we see here.A new question: It seems that the Doctor believes he caused whatever it was that brought the 100 years of hell to the Earth. But how? Did we see it in "Boom Town"? This I have to know!!!