Gaoler
Gêmeas vão viver com o tio, num vilarejo, no qual à noite são vistas figuras femininas vagando. Os aldeões acreditam que o responsável por tudo é o Conde Karnstein, que mora num castelo. Mas elas acabam aproximando-se do castelo, a despeito da proibição do tio.
Primord
UNIT is providing security cover at an experimental drilling project at Eastchester, designed to penetrate the Earth's crust and release a previously untapped source of energy. Soon, however, the drill head starts to leak an oily green liquid that transforms those who touch it into vicious primeval creatures with a craving for heat. The Doctor is accidentally transported "sideways in time" by the partially repaired TARDIS control console into a parallel universe where the drilling project is at a more advanced stage. Thwarted by his friends' ruthless alter egos, he works to save both universes.
Workman
The Doctor, Jamie and Zoe return to Earth and become embroiled in the schemes of Tobias Vaughn. They meet up with an old friend, Colonel (now Brigadier) Lethbridge-Stewart, and some old enemies, the Cybermen.
Publican
Margaret Ross is an impoverished old woman who lives alone in a seedy apartment and enjoys a rich fantasy life as an heiress. One day she discovers stolen money hidden by her son and believes her fantasy has come true.
Six children are found spread through out the world that not only have enormous intelligence, but identical intelligence and have a strange bond to each other.
