World's End
A group of teens from very different backgrounds move into a remote castle and soon find themselves on a journey full of mystery and secrets.
Cold Welcome
A group of teens from different backgrounds find themselves in a remote castle together.
Careful What You Wish For
Ever since the twins arrived, someone has been watching them, even as they sleep.
Intruder Proof
Cat has a flashback which really disturbs her and she tries to leave.
Call This Freedom?
Ghostly figures appear to Luke, Slim and AJ but seem to vanish into thin air.
Disappearances
Noah enters Duncan's apartment to get a map and is caught in the act.
Surprises
The ghosthunters are uncomfortable when they find the holding cells, and Gaia is spooked.
Foraging About
Noah and Cat discover a hi-tech elevator which takes them deep under the castle.
Going Nowhere
Noah and Cat search for an escape route. Lexy and plant-obsessed Gaia clash.
Not Everyone's Version of Normal
Noah and Cat eventually find Luke and Cat has another childhood flashback.
Happy Families?
Lexy has a dream - or is it a memory? The Morelles attempt to play happy families.
Seeing Doppel
Did Slim see his doppelganger? Is he in danger?
Leave-It Alone-Bad
An anxious Lexy has bad memories of the sci-fi area.
Mirror Matter
Slim and AJ see more doubles of Gaia and worry that the real Gaia is being held hostage.
Double Trouble
The real Gaia is distressed at being trapped in the SZ.
Same Worlds Meet
Noah drops his ID card as they leave the monument and Casey picks it up.
Trust Someone
Cat takes Moira into her confidence but then thinks Moira has betrayed her to Duncan.
Undercover of Night
Cat and Lexy sneak to the SZ during the night to talk to their twins.
Vial Goings On
Casey shows Noah toxic chemicals in the SZ - has this been the plan all along?
Guardians
Is Casey friend or enemy? Casey tells Cat he's been her benefactor throughout.
The Switch
Cat finds herself being assessed as part of a flight simulation team.
The Summoning
The twins explain they are pioneers training to build life on a new planet.
The Origin
Cat insults Noah - now he trusts Casey, will he betray her?
Divided We Stand
Noah tells Casey everything that the teens have learned.
Proof?
Slim and AJ venture to the SZ for the first time and meet their twins.
Stealing Time
With Lars's help, Lexy battles the lasers but a piercing alarm is sounded.
Prophecy
The alarm causes everyone to scatter, and Casey is in big trouble with Lena.
A Is for Apocalypse
Lena puts the SZ out of bounds but when has that ever stopped Cat and Luke?
Truth... and Lies
After more revelations, Luke and Noah have some difficult questions to ask.
Reality Bites
Mac and Skink are convinced aliens have abducted Gregor.
Unhuman Behaviour
Casey gives Noah some positive encouragement, but spins the facts surrounding the SZ.
Keep Your Enemies Close
Casey gives Moira an ultimatum, and there is some shocking news for the scientists.
Eight Hours to Impact
The teens are sent to pack but begin to rebel against the adults' plans for them.
Desperate Times, Desperate Measures
The clock is ticking and the teens take on their biggest challenge yet.
Hope
The teens persuade the adults to test a theory they have come up with.
Beyond Hope
Casey's selfish game plan becomes very clear and Noah has to make a big decision.
World's End
Everyone at the castle accepts the inevitable but Noah has information that might help.
