1. War of the Empires, Part 1: Close Encounter

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. 29 January 1979. 30 min

Liz has travelled to the Trig to join Timus in negotiating a peace between the Sorsons and the Thargons.

2. War of the Empires, Part 2: Contact!

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. 5 February 1979. 30 min

John and Mike manage to evade the crossfire as the Thargon ship is destroyed. The Sorsons land on Earth where Vishishnu contacts the President about an alliance.

3. War of the Empires, Part 3: Standing Alone

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. 12 February 1979. 30 min

Andrew heads to the White House and manages to rescue Mike and Hsui Tai. On hearing that John is being held by the Federation, the trio decide to steal a Sorson ship to rescue him.

4. War of the Empires, Part 4: All in the Mind

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. 19 February 1979. 30 min

Earth faces danger from two directions: the Thargons and the Sorsons. The Tomorrow People must somehow defeat them both to save the planet.