Professor Cawston discovered Tyso, who is starting to break-out. The Professor arranged to to show Tyso to the military. While the Tomorrow People were trying to contact Tyso, Stephen saw through Tyso's eyes and recognised the Professor. He jaunted to his office, but the Professor would not tell him if he had found another telepath. At the demonstration Colonel Masters arrived with Tricia Conway. Later Professor Cawston contacted the Stephen on a special telephone number. As a precaution Elizabeth went to his office. The Professor told Elizabeth that Tyso had disappeared. John, Stephen and Elizabeth jaunted to Tyso's caravan. John and Elizabeth went in. his mother told them that his father had sold him to Colonel Masters. John, Stephen and Elizabeth went to the Professor Cawston's office. The Professor told them that the Colonel wanted him to join the research group. Trish is a telepath, and had read the Professor's mind. She told Colonel Masters about Stephen and Elizabeth. John told the Professor that they must find Tyso within two or three days otherwise the strain of breaking-out would kill him.

Professor Cawston arranged for Stephen to demonstrate his abilities to Colonel Masters and Tricia. Tricia could tell that Stephen was deliberately making mistakes. Stephen went under cover at a hostel so that Colonel Masters could kidnap him. Colonel Masters and Tricia arrived at the hostel to take Stephen. Tricia knew that the situation had been setup, and that Stephen was in contact with the other Tomorrow People. Stephen agrees to go with them, in the car Tricia injects him and he goes unconscious. Tricia also picks up the Professor. At the research centre the Colonel shows the Professor around. He is shown Tyso and Stephen on life support machines. They have used Synaptrol to keep them there. The Professor's job was to find a way to revive Stephen and Tyso, but stopping them jaunting, but he had only a few days before there was permanent brain damage. Tricia took Professor Cawston back to his office and planted some bugs and a video camera before she woke him. Professor Cawston phoned the Tomorrow People to tell them that he had found Stephen and Tyso.

Elizabeth jaunted to the Professor's office, watched by Colonel Masters and Tricia. Elizabeth gave the Professor a ring with a homing device in it. John and Elizabeth waited all night for a signal from Professor Cawston , they then jaunted to his office. John found the ring in a cupboard. He then found the video camera. The Colonel activated the self-destruct, Elizabeth threw it away before it exploded. They jaunted away before the guards arrived. Professor Cawston woke at the research centre, Colonel Masters told him he was going to stay and work for him. The Colonel hypnotised the Professor and interrogated him. He told them about the Tomorrow People. Colonel Masters decided to wake Tyso and tell him to contact the Tomorrow People telepathically. He contacted John and Elizabeth and told them that he was at the Experimental Weapons Establishment, and to come and rescue him. John and Elizabeth jaunted straight into Colonel Master's office, and stunned the Colonel and Tricia. Professor Cawston told John where the antidote for the Synaptrol was, he opened the safe and took one of the bottles. Tricia came round and hit Elizabeth and the Professor with Synaptrol. She also hit John as he jaunted back to the Lab, he appeared on the jaunting pad and collapsed. Colonel Masters revived Elizabeth and told her that she must help them, or Stephen and Tyso will die.

Chris arrived at the Lab, he used the antidote to revive John. Elizabeth demonstrated some of her talents to the Colonel and Tricia. Tricia detected that Elizabeth was shielding her mind from her. The Colonel ordered Elizabeth to stop shielding her mind. The power overwhelmed Tricia. John and Chris to kidnapped the Prime Minister and took him back to the Lab. The Colonel told Elizabeth to jaunt to Moscow and buy a Russian doll and bring it back to his office. Elizabeth went to Russia and then back to the Lab. John opened the doll and found a small device that could be used to control a persons mind. The Prime Minister destroyed the device. Elizabeth returned to Colonel Master's office. When he found the device was missing, he threatened to turn off Stephen's and Tyso's life support machines. Just in time he received a phone call ordering him to release all the Tomorrow People. When they revived Tyso he started to break-out, they all jaunted back to the Lab, but Tyso stayed there. John and Professor Cawston returned to the research centre and fitted a Matter Transporter to Tyso. Tyso and Professor Cawston transported back to the Lab. John told Tricia that she was a potential Tomorrow Person, and that it wasn't too late.

Ambassador Timus Irnok Mosta comes to the Tomorrow People's Lab and asks for their help. He takes John and Elizabeth to the Great Pyramid of Chaeops. Timus tells them that the pyramids were built by the Kulthan, behind a secret panel he shows them Psi Damping Transmitter that used to prevent telepathic abilities operating on Earth. Timus asks them to go to a planet called Peeri to deactivate the Psi Damping Transmitter and persuade the Kulthan to leave. The Tomorrow People were asked as they are not reliant on their telepathic powers, unlike Galactic Federation agents. John, Stephen, Elizabeth and Tyso set up base on Peeri in a hideout used by Tikno. They heard a hunt taking place and went to investigate. They were hunting a girl who had escaped from them. Tyso led the hunters away while John and Stephen took the girl (Lenda) back to the hideout. Tyso got his foot stuck in a man trap, and was about to be caught by the hunters.

Just as the hunters were going to catch him a Kulthan frightened them away. Tyso managed to get away before the Kulthan captured him. Stephen found Tyso and started to carry him back to the hideout when the Kulthan appeared, Stephen stunned him with a stun gun. John and Stephen returned to try to find the Kulthan, it turned out to be Tikno. He explained that the hunt was to capture Vesh, and was organised by the Veshtaker. When captured the Vesh were burned on top of high towers, the Kulthan then used a matter transporter to take the Vesh to their space station. John, Stephen and Tikno set off for the pyramid where the Psi Damping Transmitter is located. They are followed by a Vesh Warrior, Arkron. Arkron returns with Vanyon, his leader, and other warriors, they shoot John, Stephen and Tikno with crossbows. Elizabeth, Tyso and Lenda are captured by the Veshtaker.

Elizabeth, Tyso and Lenda are locked in a water filled dungeon. John, Stephen and Tikno regained consciousness. The Vesh Warriors returned, Tikno convinced Vanyon that they were friendly and wanted to defeat the Kulthan. They decide to attack the Kulthan pyramid. Stephen and Arkron return to the hideout to tell Elizabeth what is happening, but find that everyone has been captured by the Veshtaker. As John, Tikno and the Vesh Warriors approach the pyramid they feel the effect of the Psi Damping Transmitter and hear a humming sound. The Veshtaker takes Elizabeth, Tyso and Lenda to the top of the tallest tower to be burned. Stephen and Arkron go to the Veshtaker's castle, but are captured before they can mount a rescue. John, Tikno and the Vesh Warriors attack the pyramid. Stephen and Arkron are thrown into the dungeon. John and Tikno enter the secret passage in the pyramid. John manages to destroy the Psi Damping Transmitter, just in time for Elizabeth, Tyso and Lenda to escape from the burning and Stephen and Arkron to escape from the dungeon.

A Ship arrives in orbit around the Earth. It has three people on board, the Momma, Emily and Elmer, their society is female lead. They believed that the Earth was like a wild west film. Tim tracked the ship into orbit, but the Galactic Federation had no records on the type of ship. John and Elizabeth jaunted near the Ship. The Momma told Elmer to go down to Earth to get fresh food supplies. The Ship stunned and grabbed Elizabeth, John jaunted back to the Lab. When Elizabeth woke the Momma and Emily accepted Elizabeth as an equal. Elmer has been matter transported to Earth and was collecting food. When he took some food from a shop, he shot the shopkeeper. Tim picked up the police reports, Stephen jaunted to the shop and used his telekinesis to heal him. Elmer had found a pub, and was treating it like a wester saloon. Elizabeth found out that Elmer has to return to the place he arrived, where the Doozlum pin was. She also found out that the Ship control the people on board. John and Stephen jaunted to the pub, they tried to matter transport Elmer away, but it did not work on him. They jaunted back to the Lab as the police arrived.

When Elizabeth told the Momma that Elmer had been put in jail she decided to talk to the Ship. The Ship told Elizabeth that if Elmer is not returned within one day the Earth will be destroyed. Elizabeth returned to the Lab. John formulated a plan to break Elmer out of the police station. Tyso took some bees into the police station, making everyone leave. Stephen jaunted into the cell, and Tyso found the keys and opened the cell door. They eventually lost the police. Elizabeth and Stephen took to where they thought the Doozlum Pin might be, and started to look for it. Stephen accidentally stepped on it, and was transported back to the Ship. Stephen jaunted back to Earth with the Doozlum Pin, Elmer used it. Elizabeth and Stephen jaunted back to the Lab. John jaunted up to the Ship to check that Elmer had got back safely. Emily took a liking to John, but he jaunted away. The Momma sent Elmer back to Earth, he went back to the pub, he quickly got arrested. The Momma contacted the Tomorrow People and told them that they must get him back to the Ship, or the Earth would be destroyed.

John contacted the Prime Minister, he allowed John to take Elmer out of the police station. He took Elmer back to the Doozlum Pin. Elmer refused to go back to the Ship, but he lifted John on to the pin, sending him back to the Ship. The Momma and Emily celebrated John's arrival. They fitted him with Tickling boots. Elmer got arrested again. Elizabeth asked for custody of Elmer. The Ship told John that he is to be the pair mate for Emily, and that his telepathic abilities had been blocked. Elmer arrived at the Lab. Elizabeth found out that they had lived on the Ship for many generations, and that when the next generation had been born the Momma ate the father. On the Ship John was forced to wait on Emily. When Emily left the room John locked the door and jammed the waste disposal hatch open, allowing the air to escape. John told the Ship to allow his tickling boots to be removed, he then closed the waste disposal hatch. The Ship told him that their original home planet was destroyed by nuclear weapons. The Ship was made to allow the some people to escape and search for a new planet. The Ship had decided that no planet is suitable and the search must continue. John persuaded the Ship to switch off as the search was completed. John managed to pilot the Ship down to Earth. The Momma became a shop keeper in a fish shop, Emily became a landlady in a pub, Elmer became a traffic warden.

Professor Johnston, an archeologist, opens a tomb in a pyramid. A sarcophagus opened and the archeologist passes out, the mummy walks towards her body and changes into an exact replica of her. Professor Cawston came into the tomb, but did not realise that she had been replaced. She disappeared the next day, Professor Cawston became worried and contacted the Tomorrow People. John, Elizabeth and Professor Cawston returned to the pyramid. Evergreen spotted Stephen on television as part of a magic act on Opportunity Knocks, but it wasn't Stephen. At the television studio the fake Stephen was practising his changing, he changed into Jedikiah. At the pyramid John confirmed that it had been built by the Kulthan. John opened the sarcophagus, inside was the body of Professor Johnston. Stephen and Tyso jaunted to the television studio where the next programme was being recorded. Tricia Conway also arrived. John speculated that Professor Johnson had been replaced by a shape-changer that had been in suspended animation in the tomb. Tyso went to the dressing room of the fake Stephen. The fake Stephen was also using the surname Jameson. After Tyso left, Tricia went in to the dressing room. Ambassador Timus Irnok Mosta arrived at the Lab, he had information on the Kulthan occupation of the Earth. They had rescued Jedikiah from the surface of Mercury.

Tricia still thought that Jedikiah was Stephen, she persuaded him to go to the Experimental Weapons Establishment. When they arrived they went into Colonel Masters office, Jedikiah shot and killed the Colonel. He then knocked Tricia out and took her form. John went to see Mustaf, before he could much information out of him Tricia arrived, and put Mustaf into protective custody. Tricia went to see Professor Cawston, she told him that Stephen had killed Colonel Masters, she didn't believe that it was Jedikiah. Tricia left. John and Elizabeth arrived, Professor Cawston told them about Jedikiah killing Colonel Masters. John and Elizabeth left, the fake Tricia arrived and ordered the guards to take the Professor to the headquarters. He then assumed the shape of Professor Cawston. When the Professor arrived at the headquarters the real Tricia realised what had happened. She had Mustaf brought to the office. Jedikiah tried the secret telephone number, but it didn't work. Stephen and Tyso went to Tyso's caravan for safety. Jedikiah took Professor Cawston's car and drove off. Mustaf convinced Tricia that there was a shape changer. At the caravan Evergreen went in to town to buy some fish and chips. Jedikiah found Evergreen walking back to the caravan and gave her a lift. Professor Cawston went back to his office and found that it had been ransacked, he immediately left for Tyso's caravan. John and Elizabeth jaunted to the Experimental Weapons Establishment, a guard saw them appear, and shot them. Jedikiah had taken Evergreen's form and returned to the caravan. Tricia ordered John and Elizabeth be put on to life support machines. Tyso went off into the woods. Professor Cawston and his driver Sergeant Evans, found his car abandoned, with Evergreen tied up in the boot. Jedikiah followed Tyso into the woods. Evergreen told Professor Cawston that Stephen and Tyso were at the caravan, they ran to the caravan.

Tyso returned to the caravan just before Professor Cawston, Evergreen and Sergeant Evans arrived. As both Stephen and Tyso had been alone with Jedikiah, neither of them could be trusted as they could be Jedikiah. Sergeant Evans returned to the Professor's car to get Evergreen's umbrella. Tricia tried to contact Stephen and Tyso telepathically. Stephen and Tyso picked up Tricia's message, the Professor went to his car to use his car phone. Jedikiah took Sergeant Evans' form. Professor Cawston, Stephen, Tyso, Evergreen and Jedikiah returned to the Experimental Weapons Establishment. Tricia would not let Stephen or Tyso help John and Elizabeth as one of them could be Jedikiah. Tikno arrived at the Lab, Tim explained the situation. Tricia suggested that they compare brain wave readings from Jedikiah when he was Stephen with the current Stephen and Tyso, unfortunately they thought that Jedikiah may be able to imitate the patterns. Tikno decided to help by going to the Weapons Establishment. Tricia thought that he was Jedikiah and ordered him shot. Jedikiah kidnapped Stephen and Tyso, he hypnotised Stephen in to taking them back to the Lab. Professor Cawston phone Tim on the new number, Tim told him that Jedikiah was in the Lab and to tell Tikno. Stephen and Tyso woke in the Lab, they both had silencer bands. Jedikiah returned to his original shape. Professor Cawston realised that Tikno was not Jedikiah, he and Tricia went to the intensive care unit, Tikno had disappeared. Jedikiah removed Stephen's silencer band so that he could call John and Elizabeth to prove that they were dead. Tricia heard him, and started to break-out. She jaunted to the Lab, she tried to turn Tim's power on. Tim managed to contact Timus before Jedikiah turned his power off again. Timus arrived at the Lab. He told Jedikiah that the Tomorrow People had been granted honourary membership of the Galactic Federation, and that they will leave Earth. Timus transported John and Elizabeth from the intensive care unit and returned them to health. Timus changed Jedikiah in to a human and forced him to live as a beggar.