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.

Tricia takes Jedikiah to the EWE, where he kills Colonel Masters. As a result, the EWE start hunting for the Tomorrow People.

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.

When one of his colleagues goes missing after an expedition to Egypt, Professor Cawston goes to the Tomorrow People for help. They soon realise the expedition unearthed Jedikiah, who is attempting to track them down.

John, Liz, Stephen and Tyso return to Earth to see if any more Tomorrow People have broken out in their absence. They sense the presence of another telepath, Mike Bell, and decide to leave him to break out in his own time. Unfortunately, his abilities have already attracted the attention of some criminals.

Lord Dunning takes Mike's family prisoner in order to force him to use his powers in his service. Meanwhile, John, Liz and Stephen attempt to discover his whereabouts by interrogating Slow and Two Tone.

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.

Cawston agrees to help the Tomorrow People find Tyso by introducing Stephen to Masters; however, as soon as Masters takes Stephen away, John and Liz lose contact with him.

Masters is now aware of the Tomorrow People's existence and is determined to harness their powers. He tries to recruit Cawston to his cause, revealing the true fate of Stephen and Tyso.

The Tomorrow People are visited by Timus, an ambassador from the Galactic Federation. He tells them of the planet Pyrie, where telepaths are oppressed by the servants of the alien Khultan, and asks them to go there to help them.

John and Liz are on life support at the EWE. Their only hope of recovery lies with Stephen and Tyso, but Cawston refuses to let the boys near them, afraid one of them might be the shape-shifting Jedikiah.

John, Liz and Stephen are able to secure Mike's release but are unable to prosecute Dunning without revealing the Tomorrow People's existence. However, Mike goes to Dunning and offers him a partnership.

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.

During solo flights in John's glider, Mike's mind connects strongly with an emerging Tomorrow Person, a sacrificial priestess in an Asian temple.

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.