Don't miss this unforgettable first meeting between the Tenth, Eleventh and Twelfth Doctors, with guest cameos from past incarnations, and an astonishing mystery at its heart! Under attack by the Reapers, antibodies of the universe! A photo that should never have been taken, that spells doom for reality! A breathless chase through three TARDISes! A hidden enemy lurking outside of known time! Three Doctors, three companions, and a whole host of heated discussions, flailing arms, and perfectly-phrased insults between immortal Time Lords who really should know better!