During a fitness test, Dru struggles to keep up with his classmates. The twins look into Infinity Group, the organization behind the dental check-up, which leads them to a mysterious group of unnamed kids.

From their tunnel hideout, the unnamed kids debate whether to meet with the twins. Meanwhile, Kal threatens to expose his double implant when he displays super strength during a kabaddi match, umpired by his Dadi.

Having made contact with the tunnel kids, or the Unlisted, Dru and Kal attempt to piece together what they know about the Global Child Initiative and Infinity Group. But they are interrupted by a medical emergency.

Tim returns to school, but he is behaving strangely. Discovery of the tunnel puts the Unlisted in jeopardy, and the twins have to decide whether they can trust their Bua when she accepts a job with the GCI.

Kymara makes a mistake that places the other Unlisted in danger. The twins face increased scrutiny following a new arrival at the Sharma house, Chinese exchange student Jiao.

Jiao earns the twin's trust when he helps them out of a sticky situation, but his intervention rouses the suspicion of class bully Regan. A field trip to GCI headquarters sees the boys entering the lion's den.

Horrified by what has happened to Jiao, the twins team up with Bua to bring down Infinity Group from the inside. But as the GCI takeover continues at school, the boys are barely able to maintain their cover.

Rose and Gemma make plans to meet with another Unlisted kid, Mack. At school, the new caste system stirs resentment among some of the students, and Kal begins to enjoy his Elite status a little too much.

Captured, Rose and Mack come face-to-face with Infinity Group CEO Emma Ainsworth. On a rescue mission, the other Unlisted enlist the help of Dru, who is no longer certain that he can trust Kal.

The twins manage to get a message to Rose and Mack through Bua. An elaborate escape plan goes awry when Regan gets involved, and the kids have to act fast to avoid being found out - or worse.

As Infinity Group's hunt for missing children ramps up, the Unlisted make themselves at home in the Sharma house. Dadi becomes a powerful ally when she stumbles across the kids. But Kal's behavior grows increasingly erratic.

When they discover the true purpose of the Global Child Congress, the Unlisted hatch a plan to take down the GCI mainframe. Kal's strange behavior forces Dru to make a painful decision.

The Unlisted attempt to bring down the mainframe at HQ, but walk into a trap. Under complete mind control, Kal becomes an Infinity stooge, and sets out to track Dru down.

The Unlisted and Dru make a last-ditch attempt to bring down Infinity Group. Emma Ainsworth introduces Kal to the world, and makes a surprising discovery that threatens to derail the organization's sinister plan. Series finale.