Series 1

Teenage Song Li believes that a ghost is following her, so the Powers team, including Mark and Dr Mary Holland, go to investigate. The team learn that Song Li is causing these ghostly disturbances, and Mark discovers that Song Li has special powers like him.

After David Watkins goes missing, the Powers team are sent in to investigate. In Song Li's first case, she discovers that the man was sent back in time to save his grandfather Tom. But how will they bring him out of the time hole, and back to present day?

Evan Foster and Henry Ford dig up an ancient silver goblet in Henry's backyard. Evan also spots an amulet, and decides to secretly keep it himself. But the amulet begins to take over, and the Powers team are sent in to pick up any clues as to why Evan has been acting strangely. Evan has to put the amulet back together with the goblet and rebury them, with bones also dug up in Henry's backyard, in the exact same spot they were dug up in!

A girl named Lex is arrested after trespassing on the land surrounding the huge medical centre where she's kept captive under maximum security. Mark and Song Li learn that the girl is an extraterrestrial trying to return home. Her ship lost fuel during their journey through space, and they travelled on Earth to collect their fuel, which is water. They intended to land in the ocean, but accidentally crashed near the centre. Lex wants to go back to the ship to return home, so the teens try to help her escape.

Erin begins dreaming about an elderly couple who dance with her. But when the old man shows Erin a picture, the elders get angry and leave. The Powers team are sent in to investigate, and Song Li will have to go into Erin's dreams and figure out why Erin's having these strange dreams.

The Powers team are sent to investigate the disappearance of a teenage girl who ran away from an orphanage just before her sixteenth birthday. But strange things begin occurring at the orphanage, rendering Mark and Song Li unable to control their powers. Who is blocking them out? Could it be the ghost of the girl who disappeared?

A man goes missing in a small village and it's believed that he was abducted by aliens due to bright lights that appeared where he was walking to. Everyone in the village saw the lights except the Cargills, a strange family staying for only a few days. Could they have anything to do with the alien abduction or is it all fabricated?

Teenager Ian is afraid of heights, but when he believes that he has a guardian angel, Mark is sent to investigate. But Song Li and Mary discover that people who see their guardian angels have their guardians fade away after a while. And in a dangerous attempt to fight his fear of heights, Ian's guardian fades away, and Mark must help him get across a pole high in the air without his guardian.

A young boy named Ben, in search of his lost dog, goes through a wormhole to another dimension, where he finds his dog. He returns home to find a woman and a girl claiming that the dog was theirs. But because something from another dimension was in that dimension, the world begins to swallow up. To save both dimensions, Ben, Mark and Song Li have to retrieve the dog.

After a girl walks away from a car crash unharmed with two injured in the car, someone is trying to find her. The Powers team investigate what is with this girl and why she's being tracked.

Mark and Dr Holland go to a farm where a plane mysteriously and temporarily went out of contact and then came back. While out in the yard, the owner, Neil Goodson, digs up a rock and the five people on the farm are sent back in time to when Mark and Mary were invited into the house. Mark and Neil's daughter Becky notice the time loop, and if they don't stop it in time, time could destroy everyone.

Mark becomes one of the first to try out a new machine called the Future Box, which tells his possible future. He's told not to meddle with the future because he will end up stuck there if he wants to stay. Unfortunately, he makes contact with his older self and is now unable to leave. Outside of the future, Song Li, Mary, Powers and Dixon discover that Mark is going through troubles because his pulse is going haywire. Song Li must get into Mark's future to stop it from crashing down and destroying the younger Mark.

It's Mark's birthday and to celebrate, he, Song Li, Mary and the Professor go to a soccer ground where an FA cup was won and still stays. Young Tyrone Lewis can tell the future and senses that Mark and Song Li will steal the cup. But they aren't, someone else is, and to find out, Tyrone must change the future that he sensed.