David Savile

The TARDIS arrives in no man's land during World War I. Rescued from the Germans, the travellers are put on trial by the British General Smythe who is not all he seems.

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.

The Doctor discovers that they are on an alien planet divided into different time zones where human soldiers fight never ending wars.