When the Doctor learns of the discovery of two alien seed pods in the Antarctic, he and Sarah rush to investigate. But they are too late. A man is already turning into a Krynoid.
The Krynoid is on the loose in the arctic. Scorby and Keeler have been sent to steal the alien pod and are willing to resort to murder to cover their tracks.
The Doctor discovers that they are on an alien planet divided into different time zones where human soldiers fight never ending wars.
Finding evidence of alien technology in Smythe's office, the Doctor, Jamie and Zoe make their escape in Lady Jennifer's ambulance, but Smythe gives orders to have them killed.
