All four parts from the final instalment of the classic sci-fi adventure series, in which a disparate group of telepathic youngsters form Earth's first line of defence against intergalactic and supernatural evil. In this series the Sorson and Thargon empires are still at war, with the conflict spreading ever-closer to Earth. When the Galactic Federation refuse to become involved, the team are forced to arbitrate in a peace settlement. Episodes are: 'Close Encounter', 'Contact!', 'Standing Alone' and 'All in the Mind'.