Starring Colin Baker as the Doctor, with Frazer Hines as Jamie and Wendy Padbury as Zoe. The second of three stories in which somehow the Doctor finds himself in an earlier point in his life - but he's really not the man he was. Here, the sixth Doctor is thrown into a crucial point in the final battles of the Cyber Wars. The second of a trilogy of stories putting later Doctors in earlier roles, in a story that brings back one of the Doctor's most feared (and liked) foes - the dreaded Cybermen!