Terminus Sabotaged by Turlough, the TARDIS locks on to a space liner which is carrying passengers suffering from Lazar's disease. Enlightenment The Doctor, Tegan and Turlough meet the Eternals, who are on a race through space - the ultimate prize is enlightenment. The King's Demons The TARDIS arrives in thirteenth-century England, where the Master is attempting to change the course of history. The Five Doctors The Doctor's past catches up with him when his previous incarnations, along with some old friends and foes, are drawn to the Death Zone on Gallifrey.