The TARDIS takes the Doctor, Jamie and Zoe to the battlefields of World War I but once they are captured it starts to become clear that things aren’t quite what they seem.
The Doctor, Jamie and Zoe find themselves inside a space beacon being attacked by space pirates. The travelers are separated from the TARDIS and flung into the depths of space.
The TARDIS arrives on Earth where T-Mat has revolutionized travel. However, the Ice Warriors have seized control and use T-Mat to distribute Martian seed pods across the world.
The TARDIS takes the Doctor, Jamie and Zoe to a world where they meet the Gonds who annually send two brilliant students into the Dynatrope to be the companions of the Krotons.
The travelers land in London where they agree to help find computer scientist Professor Watkins and discover Brigadier Lethbridge-Stewart is also investigating disappearances.
Escaping a volcanic eruption, the Doctor takes the TARDIS out of normal time and space but Jamie and Zoe are lured into a white void populated only by robots and illusions.
A Dominator spacecraft lands on the peaceful world of Dulkis where two Dominators, Rago and Toba, plan to turn the entire planet into a radioactive fuel source for their war fleet.