After an attack on the lab by the SIS, Mike tries to help a girl who may become a Tomorrow Person escape from the KGB.

John, Liz and Mike try to save the Russian girl from both the British SIS and the Russian KGB, with mixed success.

After the death of Pavla, the Tomorrow People decide to go on holiday, so Timus sends them to do an archeological dig on the planet Galia. There they run across two escaped slave boys.

With Mike a slave inside the camp, the other Tomorrow People attempt to drive the alien slavers off Galia.

A shopping trip sees Mike and Hsui Tai purchasing the new bubbleskin jumpsuits. When they subsequently exhibit strange behaviour, the other Tomorrow People wonder if there is more to the new fashion craze than meets the eye.

John and Stephen follow Liz into hyperspace, where they manage to rescue her and return her to the lab. Convinced of their story, she agrees to help them investigate the paintings, which seem to induce violence in those around them.

Robert explains to John that his race uses violent energy as a power source. If they stay on Earth, they will die, but the violence needed to power their departure will completely destroy Earth's civilisation.

John is being held prisoner by Robert in the cellar of the antique shop, unable to use his powers. Chris attempts to rescue him but only succeeds in getting himself in trouble with the police.

Stephen and Paul suspect Laird is involved in Douglas' kidnapping and follow him, only to learn the whole incident was set up by the Doomsday Men. Stephen teleports both boys back to the lab where the Tomorrow People try to convince them to help stop McLelland.

To calm Andrew down, John must play him at his own game.

John and Stephen find themselves with two mysteries to investigate - the possibility that Stephen's new teacher Elizabeth M'Bondo is a Tomorrow Person and some worryingly accurate paintings of alien planets.

A new peace treaty is about to be signed but the Tomorrow People are worried about the Doomsday Men, an organisation dedicated to the perpetuation of war. Stephen is sent undercover at the same school, as the grandson of the group's leader.

The Damocles is in the hands of the Doomsday Men and the Tomorrow People are powerless to act. Any attempt at intervention and McLelland will throw the dead man's switch and launch nuclear missiles towards the Earth.

The Tomorrow People all have dreams about a headless Highlander and suspect a new Tomorrow Person is breaking out; This is Andrew Forbes, a boy with the power to create illusions, but his father is far from pleased with his new abilities.

John and Stephen rescue Liz from the youths and find out about the second painting. John buys it from a man who turns out to be Robert's grandfather and takes it back to the lab, only to find out it may be a trap.

The Tomorrow People use a cold virus to battle the parasitic Ballboids.

History has been altered and the Roman Empire now encompasses half the galaxy. The Tomorrow People and their friends must return to the past to put things right, but Gaius is in hot pursuit.

Stephen earns the respect of Douglas and the others and is invited to join the Doomsday Men. Meanwhile, an accident at the Damocles space station leaves an astronaut in danger, so the Tomorrow People decide to intervene.

A pair of odd aliens arrive on Earth with the purpose of mining a rare mineral, which can suppress telepathic powers.

TIM jaunts John and Stephen back to the lab where Kenny attempts to revive them. Meanwhile, Jedikiah forces Peter to take them back to the 20th century one last time.

Stephen is transported to the Hall of the Time Guardians where he meets Zenon, Peter's grandfather. Peter has become lost in the past and his only hope of rescue lies with the Tomorrow People.

Adolescent Stephen Jameson doesn't know it but he's about to break out, and several other special teenagers, as well as two thugs, hope to find him when or before he does.

The Tomorrow People and Steen must find a way to save the workers trapped in Spidron's collapsing mine workings. Then they must track down Spidron and Sandor and stop them escaping or the entire Earth will be destroyed.

John, Liz and Chris plan an attack on the gladiator training school to try and rescue Stephen and Peter, but none of them have realised Gaius' true nature.

To save the Earth, the Tomorrow People must overcome two criminal aliens but without the use of their telepathic abilities.