Episode 1
Aired May 2, 2015
Cold Welcome
A group of teens from different backgrounds find themselves in a remote castle.
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Episode 2
Aired May 2, 2015
Careful What You Wish For
Someone has been watching the twins since they arrived.
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Episode 3
Aired Mar 31, 2015
Intruder Proof
Steph tries to justify her big lie; the twins argue over Duncan's odd behavior.
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Episode 4
Aired Apr 1, 2015
Freedom
Noah and Cat feel like prisoners after being caught by Lena; they organize a protest and the rules are relaxed a bit, although Cat still feels alone; ghostly figures appear to Luke, Slim and AJ, but seem to vanish into thin air.
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Episode 5
Aired Apr 2, 2015
Disappearances
Noah enters Duncan's apartment to get a map and is caught in the act.
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Episode 6
Aired Apr 2, 2015
Surprises
Noah and Cat bond while searching for the cave; Adam Senior is thwarted when he tries to spy on the teens; the ghost hunters are uncomfortable when they find the holding cells; Gaia is spooked.
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Episode 7
Aired Apr 6, 2015
Foraging About
Noah and Cat discover a high-tech elevator which takes them deep under the castle; when AJ tries to explain to Mackenzie that they are not dating, he finds himself on a date with her.
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Episode 8
Aired Apr 7, 2015
Going Nowhere
Noah and Cat search for an escape route; Lexy and plant-obsessed Gaia clash as roommates; worryingly, Luke seems to have disappeared.
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Episode 9
Aired Apr 8, 2015
Not Everyone's Version of Normal
Luke has found the cave with unusual drawings; Cat has another childhood flashback.
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Episode 10
Aired Apr 9, 2015
Happy Families?
The Morelles are caught off guard when Noah requests to see his birth certificate and baby photos; attempts to dig the cave floor result in ear-piercing screeching noises.
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Episode 11
Aired Apr 9, 2015
Seeing Doppel
Did Slim see his doppelganger? Is he in danger? Elsewhere, the ghostbusters do a space-clearing ritual to get rid of evil.
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Episode 12
Aired Apr 13, 2015
Leave It Alone - Bad!
An anxious Lexy has bad memories of the sci-fi area. A spooked AJ and Slim smuggle Mackenzie and Skink in to the castle to help catch the evil spirit in Gaia but their ghost trap sets the place on fire with Gaia trapped inside!
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Episode 13
Aired Apr 14, 2015
Mirror Matter
Somehow, Gaia is free but Mack and Skink get harsh treatment from Lena; Slim and AJ are in trouble too but still puzzled by Gaia.
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Episode 14
Aired Apr 15, 2015
Double Trouble
Slim has several theories about the doubles and Noah thinks they must be twins; Luke and Cat find a box of her mum's things in Duncan's quarters.
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Episode 15
Aired Apr 16, 2015
Same Worlds Meet
Gaia and SZ Gaia swap places just in time before Duncan's scan confirms SZ Gaia is the right one; the real Gaia describes what she has seen to the other teens.
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Episode 16
Aired Apr 16, 2015
Trust Someone!
Cat talks to Moira in confidence but then thinks Moira has betrayed her to Duncan; Noah thinks he can trust Casey but Cat isn't so sure.
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Episode 17
Aired Apr 20, 2015
Undercover of Night
Cat and Lexy sneak to the SZ during the night to talk to their twins. However, adults are everywhere in the SZ and it's not safe. A disappointed Lexy learns that her twin died very young.
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Episode 18
Aired Apr 21, 2015
Vial Goings On
Casey shows Noah toxic chemicals in the SZ, has this been the plan all along? Are the twins being used as terrorists? Cat decides to go to the authorities, Lexy lets the news slip and Cat finds herself locked into a 'cab' driven by Casey.
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Episode 19
Aired Apr 22, 2015
Guardians
Casey tells Cat that he's been her benefactor throughout and wants her to work with him; Gregor and Gaia bond over a stray dog.
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Episode 20
Aired Apr 23, 2015
The Switch
Cat finds herself being assessed as part of a flight simulation team; Cat's sister discovers life beyond the SZ, childrens' toys and the joys of freedom in the outside world.
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Episode 21
Aired Apr 23, 2015
The Summoning
The twins explain they are pioneers training to build life on a new planet; Luke borrows AJ's Pictish ball and discovers a stone circle in the cave.
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Episode 22
Aired Apr 27, 2015
The Origin
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.
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Episode 23
Aired Apr 28, 2015
Divided We Stand
Noah tells Casey what the teens have learned, but Casey has a plausible explanation; Noah, Cat and Lexy find something very strange while exploring Casey's quarters.
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Episode 24
Aired Apr 29, 2015
Proof?
The discovery at Casey's place sends Lexy, Noah and Cat scurrying away, but Cat accidentally drops her necklace; Slim and AJ go to the SZ and meet their twins, who have proof of a previous mission.
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Episode 25
Aired Apr 30, 2015
Stealing Time
Cat seems to have disappeared; Gregor and Gaia bond as they try decoding the SZ symbols; Lexy and Luke appeal to the twins to borrow The Object.
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Episode 26
Aired Apr 30, 2015
Prophecy
Casey is in big trouble with Lena; the Object shows the teens more than they expected.
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Episode 27
Aired May 4, 2015
A Is for Apocalypse
Lena and her team have to explain the ACT to the enquiring teens, but there are still many questions left unanswered.
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Episode 28
Aired May 5, 2015
Truth... and Lies
After more revelations, Luke and Noah have some difficult questions to ask but will Steph and Duncan tell them the truth?
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Episode 29
Aired May 6, 2015
Reality Bites
Noah and Luke compete against each other. The truth is becoming clearer but it is causing a lot of unhappiness. Mac and Skink are convinced aliens have abducted Gregor.
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Episode 30
Aired May 7, 2015
Unhuman Behaviour
Casey gives Noah some positive encouragement but spins the facts surrounding the SZ. There is a major confrontation down in the SZ but Lena takes control - or so she thinks.
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Episode 31
Aired May 7, 2015
Keep Your Enemies Close
An apologetic Noah gets Slim to help him hack the computer. Casey gives Moira an ultimatum, and there is some shocking news for the scientists.
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Episode 32
Aired May 11, 2015
Eight Hours to Impact
The teens are leaving. They are sent to pack but begin to rebel against the adults' plans for them. Casey, in hiding, needs to get back into the castle.
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Episode 33
Aired May 12, 2015
Desperate Times, Desperate Measures
The clock is ticking, Casey finds allies, Moira is fed a lie, AJ slips out from the castle to visit Mac and the teens take on their biggest challenge yet.
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Episode 34
Aired May 13, 2015
Hope
The teens persuade the adults to test a theory they have come up with; Noah is elsewhere with Gaia; Cat and Luke follow them, and it looks like Noah has switched his allegiance.
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Episode 35
Aired May 14, 2015
Beyond Hope
Casey's previous lie to Moira has sent her desperate to the castle for help, and Lexy, Gaia and Lucky the dog join the search for Gregor.
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Episode 36
Aired May 14, 2015
World's End
Everyone accepts the inevitable, but Noah has information that may help; the SZ teens experience their last chance at freedom; Lexy is in for a shock.
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