An epic six-part adventure celebrating 20 years of Doctor Who at Big Finish. Time is collapsing. Incidents of chaos and devastation are appearing throughout the lives of one Time Lord and his many friends - all fallout from one terrible disaster. From Earth's past and present to timeless alien worlds, from the cloisters of Gallifrey into the Vortex itself... The Doctor must save universal history - and he needs all the help he can get.