The Doctor arrives on a planet where two tribes, the savage Sevateem and the technically brilliant Tesh, are at war. He meets Leela, an exile from the Sevateem, and discovers that the tribes' god of evil is apparently himself...

The Doctor and Leela must catch a killer on a vast mining ship run by robots and humans.

The present day: just as the Fourth Doctor and Leela arrive in Fetchborough, England, Professor Fendelman prepares to experiment on a fossilized skull which science says should not exist. The skull is actually an artefact of the Fendahl, a god-like being who feeds on the life force of others. It has begun to awaken and kill. Worse yet, others seek to exploit the Fendahl's dreadful power.

A spaceship crashes approaching the planet Cephlon and when the crew of the Liberator answer the distress call they find their own lives endangered. Blake is caught in a desperate race against time to save the lives of the crew and also find the mysterious ORAC. Once in Blake's possession, ORAC predicts the future of Blake and his crew by showing them an image of the Liberator blown to atoms in space. Blake is powerless to alter their inevitable destruction, and when the Liberator is seized by a hostile force, a series of terrifying events sets the prophecy in motion.

Supreme Commander Servalan assigns the task to the deadly Travis-his orders simply to seek, locate and destroy Blake's 7! Travis and his Mutoid crew clash with Blake in a crucial struggle over the Federation's secret cypher machine and again in desperate hand-to-hand combat on a mysterious dead planet. Finally, they confront each other on a barren ice world as Blake attempts to rescue the resistance leader, Avalon. This time, however, Travis is expecting him, and a terrible trap awaits. . .

Freddy Slater, a public relations man, has the day to end all days.

The Intergalactic War is over. The Combined forces of Earth's galaxy have triumphed over the invasion force from Andromeda, but the price of victory has been high.