A whole universe is at stake, and the three Doctors must unite to save it.The tenth hunts Zygon werewolves in Elizabethan England. Eleventh explores the mysterious paintings in the National Gallery today. And the third, the man they once were, but who is never spoken of, is fighting the Daleks in the Time War. Driven by desperation, the War Doctor prepares to make a terrible decision that will affect the fate of the entire world... a decision that even the Time Lord cannot make alone.On this day, the different incarnations of the Doctor will stand shoulder to shoulder to save the Earth , the universe and your own soul.