Board Thread:Tales from the Tardis/@comment-188432-20130325173913/@comment-188432-20130409010734

Your Torchwood example is not what "side universe" means. Torchwood is not in another universe. There are clear references to UNIT and the Doctor in every single series. You can't possibly think that Kiss Kiss, Bang Bang has Jack coming back to Torchwood from a totally separate universe. Nor can you reasonably believe that the sound of the TARDIS that's heard in End of Days is something Jack can hear from a physically separate universe. Or that the Martha and UNIT are some sort of weird alternate version of themselves—I mean, it's rather the point of their appearance in The Stolen Earth that Reset has in fact happened. It is not the point of The Memory Box that the Seventh Doctor adventure happened. The producers are flatly telling us that they intend it as a distinct universe that the Doctor has visited once. This is precisely the case with the Seventh Doctor's relationship to the Marvel Universe.