[[Category:th century| *]] [[Category:s| *]] [[Category:th century decades]] 21 December 2547, was the earliest possible date for the Battle of Bellatrix. Dalek forces engaged the Earth Alliance's Spacefleet at Bellatrix. At the end of the battle, Admiral Isaac Summerfield's battleship, the Tisiphone, fell into a spatio-temporal rift and was transported to Earth 1963. (PROSE: Return of the Living Dad)