Graham Weston

The Doctor and Sarah are drawn to the farthest limits of the Universe when they receive a Mayday call from a planet on the edge of creation called Morestra. The planet is threatened by a monster from the anti-matter universe.

Lost in the universe of antimatter, the Doctor communes with the creature and makes a bargain. Sarah discovers Professor Sorensen's dark secret which threatens to overwhelm him.

The Doctor and Sarah are held responsible for the deaths on Zeta Minor, but the Doctor knows that the real culprit comes from the mysterious universe of antimatter.

The rebels seize control of the Aliens' HQ but the Doctor is forced to send a call for help to his own people, the Time Lords.

The Doctor is captured by the War Chief who belongs to the same race of people as the Doctor and offers an alliance. In the 1917 zone fighters prepare to attack Central Control.