In the serial Inferno, we are introduced to a alternate universe where history as we know it has gone differently, with a fascist Britain as its main focus. It opens up several interesting possibilities that have been explored a few times. So why not revisit it? Considering the fact that inferno’s version of the mohole project went horribly and I mean HORRIBLY wrong, we could have a story where the Doctor and their companions accidentally end up in the destroyed inferno universe and try to survive.