Dr Who - 126 - Mawdryn Undead - Synopsis
Dr Who - Peter Davidson - Series 20 - ep 3 - tep 126
######################################################
The TARDIS materialises on a huge spacecraft, concealed above the Earth. The Doctor and his companions are separated - the Doctor uses a transmat device to go down to Earth, while Nyssa and Tegan follow in the TARDIS. Arriving on Earth in 1977, Nyssa and Tegan meet up with the (retired) Brigadier and search for the Doctor. They are horrified when they meet a creature that claims to be the Doctor after an unsuccessful regeneration - locked into a continuous cycle of regenerations! But is it the Doctor?