Series 1 The Sparticle Mystery follows a group of 11 children left to fend for themselves within modern-day Earth after a science experiment at 'The Sparticle Project' goes wrong, resulting in all those of age 15 and over disappearing into a parallel universe, at precisely 11:11a.m. Initially, the world becomes their exciting playground. With adults' rules, laws and orders all removed, youngsters have great fun fulfilling many wishes, including raiding sweetshops etc. However, as the world's resources start to dwindle and daily survival gets harder, the youngsters resolve to bring the adults back by venturing to the
top secret 'Sparticle Project'. They are aided in their quest by a number of clues left before the disappearance of a woman named 'Doomsday' Dora, a scientist who worked on the Sparticle Project. Along the way they have many adventures and learn important life skills. Early in episode one we discover that in this 'post-disappearance' world, opportunistic gangs soon come to inhabit the streets. This prompts the lead male character Sadiq to usher his newly formed tribe to safety in the City Hotel. After discovering her Mum and older sister missing, a scientifically minded young girl called Kat takes charge of Liam, the small boy next door. They too try to gain entry to the City Hotel, but only Liam gets in, leaving Kat to initially fend for herself, before Sadiq caves in and allows her entry. One of the tribe, a young girl called Reese, soon starts to experience strange events, which eventually turn out to be the manifestation of her own latent psychic powers. Kat and Reese quickly deduce that the Sparticle Project is behind the adults' disappearance. The 'Sparticles' tribe then split in two: the 'Ranchers', Tia and Jeffrey (who has
cerebral palsy), who stay at City Hotel with the two younger kids, Liam and Frankie, and the 'Questers', (Sadiq, Kat, Jordan, Ami, Holly and Reese), who go in search of the Sparticle Project. Also featured is Callum, a tough streetwise young teen, who appears to be the Sparticles' enemy at first, but later joins their side. When a girl living at The Sparticle Project interferes with the machine, Reese and Muna, another child with special powers trapped between dimensions, step in to try and fix the problem, but Kat chooses Reese over the adults and shuts down the machine permanently. Before she disappears, Doomsday Dora tells the Questers to travel to the Quantum Nexus and gives them a mysterious key.
Series 2 One year later, the team continue to attempt to bring back the adults by locating the Quantum Nexus after it is discovered that the key unlocks a further clue leading to specific treasures that will guide the children there. It quickly becomes a race between the Sparticles (except Kat, Ami, Jordan and Holly) and Fizzy's deputy Serena, who is joined by Holly. Along the way, the Sparticles discover more children have powers like Reese, and name them "Sensitives." After following clues relating to the "Artos" tribe, the Sparticles are joined by Serena, who was secretly a double agent, in stopping Fizzy, Ernesto and Holly from destroying the Quantum Nexus with Reese, who switches sides after receiving a warning from Muna. Reese interferes with the process of reuniting the children's and the adults’ dimension using her sensitive powers and the adults arrive at the children's dimension as teenagers.
Series 3 In the third season, the world is taken over by the newly arrived Queen Kylie, who locks up the remaining Sparticles (Sadiq, Reese, Serena, Holly and Frankie). Kylie's brother Erimon releases the Sparticles but is unable to recapture them, and the Sparticles (joined by the sensitive Aris, Holly's teen mother Kim and Ernesto) embark on a mission to rid the world of the Teen Parents and send them home to the 1980s. While travelling around the country in one of Queen Kylie's stolen tracker vans, Reese discovers "The Circle of Perpetual Time" which, when 7 sensitives are linked up with it, will be able to send the parents home using the power of an energy-boosting Comet. Holly becomes pregnant with Ernesto's child, who turns out to be the final sensitive. In the end, the Sparticles eventually bring the teen parents to their dimensions and bring back the parents. ==Cast and characters==