The year is 1989. In London, safecracker Raine Creevy breaks into a house - and finds more than the family jewels.
In the Middle East, the kingdom of Sayf Udeen is being terrorised by Soviet invaders and alien monsters.
And on the Scottish border, a highly guarded facility contains an advanced alien weapon.
These are all part of the Doctor's masterplan. But masterplans can go awry....
Directed by Ken Bentley.