The Nowhere Boys are back and Luke's attempts to convince the gang that a new threat is imminent are dismissed until the threat proves too big to ignore.
As the Gang fight off the latest threat, Jesse's preoccupation with a cyber bully puts their biggest secret at risk. When the menacing creatures attack again, the Gang fight back by sending them out of this world.
Nicco jeopardises both the Gang's plan to rescue one of their own and her football ambition - but as Bates closes in, can Nicco redeem herself and save the day?
Bates is on the warpath. Convinced he is close to exposing a conspiracy gripping Bremin High, he interrogates the Gang. Will one of them crack under the pressure? And the arrival of a stranger puts Heath under the spotlight.
Desperate to get Felix's book back, the Gang search for Zeb, the mysterious stranger. But when Luke is kidnapped, they all find themselves drawn into a dangerous trap.
The Nowhere Boys take a wrong turn in their quest to find Zeb, landing them in danger and on the run. Meanwhile Ben and Ellen decode clues left by Zeb and try to find a way to bring them home.
Captured, Nicco and Luke are interrogated and forced to confront alternate versions of themselves. Heath and Jesse learn that their friends are imprisoned in a high-security facility and plan a breakout.
The Gang and their doubles join forces to try and escape their captors amidst increasing Nematode attacks, but can they repair the Talisman in time to avert tragedy and find their way home?
With the Guardian in Negative Space, the Gang believe they have saved the multiverse until a catastrophic event at Bremin High suggests otherwise. Will the Gang be forced to expose their powers in order to save the school?
The Gang arrive in Negative Space for a final showdown with the Entity - the fate of the multiverse is in their hands. If only the Guardian could remember the plan.