The year is 1989. In London, safe cracker 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…