Holt

After crash-landing on the hostile prison planet Fomoire, Roo, Umba, and Metric must survive the planet's dangers and meet the energy being Jeannie, their only hope for escape.

Reen

When a vortex brings a charming but mysterious reptilian stranger named Reen to Fomoire, the gang must decide whether to trust him or stop his dangerous quest for Jeannie's power.

Hoovalent

The gang discovers a mysterious signal box from Eire but must brave a crater guarded by a bizarre creature to recharge it

Kano

When a massive rock monster threatens the gang, they must summon Holt to protect their only hope of reconnecting with Eire—a fragile signal box carrying messages from home.

Ice-Vohr

The gang encounters the maternal Ice-Vohr, whose glowing "transports" turn out to be eggs—and must protect them from a deadly predator.

Dobhar

Struggling with self-doubt, Umba leads the gang through treacherous terrain until her instincts uncover a crucial piece of their lost pod, sparking renewed hope for escape.

Spidercrab

When Roo and Umba fall into a dangerous crevasse swarming with deadly spider-crab creatures, Metric must overcome his fear and use his unique abilities to save his friends.

Doppo

The gang battles elite Blight assassins to protect a crucial piece of Loah, only to face devastating losses—and an unexpected spark of hope for their mission.

Avertack

When the ancient energy-devouring Avertack is unleashed, the gang must summon Holt to battle the powerful creature before it destroys everything—but victory comes at a cost.

Taranis

After an explosion leaves Umba and Metric invisible and fading from existence, Roo must battle a storm-bound winged serpent to save his friends before they vanish forever.

A reckless encounter with Ash, Roo's arrogant childhood idol, leads the gang into a deadly Blight prison, where unity is the key to survival and escape.

Banshee

An ancient Banshee traps the gang in a dangerous illusion, forcing Umba to unlock an unexpected superpower to save the day.

RagRazR

Seeking refuge from a thorn-covered predator, Roo, Umba, and Metric encounter the deadly Rag-Raz'R, uncovering an annual terror and a surprising clue to their journey home.

Changeling

Guided by Hallan's ancient key, Roo, Umba, and Metric enter a treacherous stone maze to retrieve the Formoire Core Stone, facing shape-shifting dangers and testing their trust.

Bangort

Roo, Umba, and Metric follow a frail stranger through Croaghaun Forest in search of the hyper gate, only to uncover a sinister plot when the demon-spider Bangort strikes.

The Hyper Gate

The teens find the Hyper Gate, but a swarm of deadly centipedes threatens their escape - forcing Roo to choose between going home alone or staying loyal to his friends.

Puca

Betrayed by a desperate wanderer, the teens are captured by the Blight but stage a daring escape with an unexpected ally.

Jeannie

Jeannie embarks on a journey of solitude across Fomoire, rediscovering her purpose and the true meaning of friendship.

Megalocerous

Jeannie's buried past comes to light when ancient bones reveal a tragic choice she once made to save Fomoire's ecosystem.

Selkies & Tentagon

As Branock unleashes Tentagon, a monstrous energy-draining creature, Roo, Umba, and Metric must cross ice, fire, and desert to find their lost transport and save Éire in time.

Morrigan

Stranded in the desert, Roo, Umba, and Metric battle exhaustion and a spider-crow. With Morrigan's guidance, they challenge Balor, Fomoire's ruthless leader, for Éire's survival.

Loah

With Loah partially restored, Roo, Umba, and Metric face Balor, Fomoire's fearsome leader, in the Circle of Death. But Roo's self-doubt threatens their survival and Éire's fate.

Balor

Roo, Umba, and Metric challenge Balor in the Circle of Doom to unite the planet's creatures. But as Roo battles doubt and grief, he must find the courage to fight for their future.

Reunion

As Tentagon drains Éire and targets Fomoire, Roo, Umba, and Metric reunite with family and uncover Holt's power. With Balor's help, they must stop the Blight before Branock wins.

Great Battle 01

As Branock absorbs Tentagon's energy, Roo, Umba, and Metric unite Fomoire's creatures. With Jeannie's discovery and the Blight closing in they must harness Holt's power to stop him

Great Battle 02

Roo, Umba, and Metric unite Fomoire's forgotten inhabitants for a final battle. As Jeannie unlocks Holt's power they must harness Super-Holt to defeat Branock and free the universe

Ireland

RTÉ2

On their way home from a school excursion, Blaize, Umba and Metric, three teenage classmates from the planet Krill who have never previously spoken to each other and are polar opposites in personality, shape and form, are suddenly knocked off course by an electric pulse that's travelling through the universe. They become shipwrecked on the long-forgotten, ancient prison planet of Taos, a threatening world of monsters, magic and secrets, hidden in the universe's Red Zone.Here, they're greeted by Ginne – a magical, reflective prism. By shaking hands with Umba, Ginne learns that the teens are not a threat but merely lost and good natured so she decides to become their guide. To aid them in their defense against the planet's dark forces, Ginne empowers them with the ability to work together by assembling themselves and combining into one unit – HOLT, a super being who has the wisdom and power of all their planet, parents and ancestors. Holt can fight off most monsters, but he can only sustain his form for a few minutes at a time.After Blaize, Umba and Metric overhear a strange being's secret message, it becomes clear that the universe is now under attack from an evil, ancient race known as the Ckrook. The teens must now not only survive planet Taos, but also gain allies to fight the Ckrook and help save the universe if they are ever to safely return to Krill, their home.

Holt

Episodes

Synopsis