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The darkest mysteries are unraveled in WONDERfools Episode 4, revealing the truth behind Dr Ha’s experiments and a life-changing moment for Chae-ni.
The WONDERfools Get a Game-Changer — Possibly Their Most Important Episode Yet
Four episodes in, The WONDERfools stops teasing its larger mythology and starts peeling back the curtain. What starts as a quirky supernatural drama suddenly turns quite serious here, part science-fiction tragedy, part conspiracy thriller, part emotional character study.
Episode 4 doesn’t just answer questions. It asks even bigger questions, giving viewers their clearest look yet at the terrifying history behind the Wunderkinder experiments, the mysterious Child of Eternity and why Dr Ha may be far more dangerous than anyone realised.
And when the credits roll, it delivers one of its most visually arresting cliffhangers yet.
The Ghosts of Hawondo Lab Won’t Stay Buried
The episode opens with a trip back in time and right away it’s clear that these memories are going to change how we see everything.
Ju-ran recalls the beginning of her relationship with Dr Ha, when her hearing loss was still there, and before he fitted her with hearing aids. What initially feels almost compassionate turns into something darker as the memories continue.
The Hawondo Lab fire, the scientist in jail, and the children he sent into hiding all tell the story of a man who has spent years building something far more expansive than anyone knew.
Now free, Dr Ha is not wasting time returning to his old ambitions. His mission is simple. But terrifying. Find the Child of Eternity.
That one phrase changes the tone of the whole series.
Madame King Finally Confronts Her Past
Jeon-bok, alias Madame King, is forced into a confrontation that has been years in the making.
Dr Ha does not treat her as an old colleague. He comes to her as an enemy.
He accuses her of funding the experiments that have cost so many lives. Jeon-bok says she thought she was helping vulnerable children, not funding human misery.
It’s one of the episode’s best exchanges, because neither side is blameless.
Then Ju-ran uses her skills to wring answers out of her, ratcheting the tension another notch up.
But the biggest revelation comes when Jeon-bok insists that the Child of Eternity died long ago… only for Dr Ha to nonchalantly remind everyone that this child was never able to die in the first place.
That one moment changes everything.
The Most Disturbing Flashback Yet
If viewers are still unsure how cruel Dr Ha really is, Episode 4 dispels all doubts.
The flashback shows the brutal experiments being performed on a young boy, presumably the Child of Eternity, while Un-jeong looks on helplessly.
It’s a difficult sequence to watch, not for the graphic imagery, but for what it represents.
Un-jeong’s eventual loss of control, which sets off the fire that destroyed Hawondo Lab, suddenly makes emotional sense. It was not rebellion.
It was a sorrow.
It was fury.
And perhaps guilt.
This revelation adds layers to Un-jeong that the series badly needed.
Chae-ni, Ro-bin and Gyeon-un Finally Start to Grasp Their Gifts
After a handful of episodes of chaotic powers with little explanation, the younger trio finally begin to figure out how their powers actually work.
And, thankfully, the show chooses character-driven discovery over exposition.
Chae-ni’s power is fear-based.
Chae-ni finds out that her teleportation is activated by a surge of heartbeat.
It’s a clever detail, for it suits her erratic energy and impulsive personality to a T.
Ro-bin’s power comes from emotional overload
Ro-bin finds that he shows his powers when he gets emotional enough to break.
This feels emotionally earned given his past with bullying.
Gyeon-un’s ability is triggered by anxiety.
Meanwhile Gyeon-un learns that his strange stickiness power is activated whenever he lies or gets nervous.
It’s funny and weirdly fitting.
These discoveries make the trio seem like real future heroes instead of comic relief.
Dr Ha’s Real Cruelty Can’t Be Ignored Any Longer
Elsewhere, Dr Ha learns, another experiment – this time involving Bong-pal – has gone wrong.
His answer?
Kill him.
Certainly. No regrets.
Just a disposable subject.
Even Yu-ran starts to worry that if they never cure the side effects, they’ll end up the same way.
Loyalty means nothing to Dr. Ha. It is becoming clearer and clearer.
The Junkyard Fight Is The Most Exciting Action In The Episode
It all culminates in a junkyard battle of madness and for once The WONDERfools fully embraces its superhero identity.
Pal-ho comes in like a runaway weapon, forcing Un-jeong to fight right away.
What ensues is chaos, unpredictability, and just the kind of action this show needed.
Ro-bin has a big moment, being able to stop a flying car mid-attack, a real breakthrough for his character.
But it’s Chae-ni who steals the spotlight.
She loses all control of her teleportation and teleports herself and Un-jeong out of the battlefield completely without knowing it.
And where do they wind up?
Under the Northern Lights… and on the Cusp of Death
And this last sequence is breathtaking.
The whole episode Chae-ni has been talking about the Northern Lights.
It was like a crazy dream.
Instead it becomes the emotional centrepiece of the episode.
Finally she gets what she wants, but at a terrible cost.
Under one of the most beautiful sights imaginable, Chae-ni’s fate hangs in the balance as Un-jeong desperately tries to save her, bleeding out.
Just when it seems it’s too late…
Her eyes pop open.
And Episode 4 fades to black.
An absolute savage cliff-hanger.
What Episode 4 Tells Us About The Larger Mystery
This episode confirms a couple major theories:
Jeon-bok probably thought the original Wunderkinder research would help children, so he paid for it.
It seems that Dr Ha has succeeded in creating or discovering an immortal child.
Un-jeong’s link to the Child of Eternity may be much more powerful than has been suggested.
The Hawondo fire was almost certainly an attempt by Un-jeong to end the child’s suffering.
But one big question mark remains.
Why do Chae-ni, Ro-bin and Gyeon-un have powers at all?
So far their link to the original project is frustratingly unclear. The show keeps teasing a bigger explanation, one Episode 4 hasn’t yet delivered.
But the mystery is getting more fun than annoying and that’s a good thing.
The Final Verdict
Episode 4 is an easy So far the best chapter written by the WONDERfools.
It has a much better balance of mythology, emotional backstory, action and character development than prior episodes and finally makes the central mystery worth buying into.
Un-jeong is getting a lot more emotionally interesting, Chae-ni still gives every scene some unpredictable energy, and Dr Ha is becoming a really creepy villain.
If the series can keep up this momentum, The WONDERfools could be building towards something much bigger than it first appeared.
Rating: 8.8/10. Darker, smarter and a much more emotionally satisfying episode.