The shape-shifting alien has escaped and is posing as someone at the facility, but who?

Trapped on the spaceship, Dragonfly must decide whether to stay or fight, as the prospect of a life off-world looms closer. Back on Earth, some important people have questions.

Kaz is still missing, and the rest of Dragonfly feel uneasy about leaving the camp without her. Fisher has a proposal for Louis - but can he be trusted?

With Louis in a bad way, and his condition worsening, Meg blames herself. However, Kaz manages to buy them a little time and looks to Dragonfly's past for a way to save him.

Allegiances are tested for Dragonfly when a new player joins the game, while the third challenge reveals the last of the artefacts' locations and something lurking in the shadows.

A call for help from some old acquaintances sees Dragonfly reunited.

With the news from the previous night still on everyone's minds, an unexpected visitor shows up at the facility. While in the camp, Meg and Kaz find they are stronger together.

Louis, Meg, Glen and Kaz discover they are one of four groups, each with their own alien artefact and part of a game to save the world.

Outsiders Louis, Glen, Kaz and Meg are group Dragonfly. When Kaz runs away from camp in the middle of the night, the rest of her group go after her, only to stumble upon a strange anomaly in the woods.

With the second challenge seemingly impossible, it is left to Louis to find a solution. Meanwhile, frustration grows for Meg as Jay and Kaz find an unlikely distraction in each other.

Back in the city, Bea McConnell makes contact with one of the losers of the first challenge. With Alice and Finn, they go in search of Bea's missing friends.

After testing the rock’s teleportation abilities by sending objects through it, Louis agrees to let Glen go through himself and seeks Bea’s help to keep watch. But things don’t quite go according to plan.

An abandoned cabin isn’t quite what it seems for Bea and Louis, while Meg and Glen discover a new quality to the alien rock in the ground.

Feeling that they are in danger, Emma shares her night-time discovery with Maeve. Dragonfly know their friendship is at stake as they ally with Landslide and take on the first challenge.

As Bea and the others find some fun distractions in their new environment, Kaz searches for a way out. However, something is very wrong in this world.

While Dragonfly and Bea try to make sense of their predicament, Finn and Alice help Meg avoid some unwanted attention from outside the camp.