'HEAVEN. HE SAYS WE'RE ALL GOING TO HEAVEN.'
On its way to Earth the TARDIS unexpectedly materializes on an alien spaceship. The occupants invite the Doctor and his companions to accompany them to Earth; but their hospitality is not all it seems...
On board are people from all eras of Earth's history and the aim of the Urbankans and their reptilian leader, Monarch, is to colonize Earth. Three billion minds are aboard the ship, three billion memories awaiting new, android bodies that will enable them to escape their own dead planet and live forever...