As of July 2026, Nadia: The Secret of Blue Water Season 1 aired in 1990 with 39 episodes — streaming now on Retrocrush. Full episode guide and where to watch below.
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Nadia: The Secret of Blue Water Season 1

1990 39 Episodes Animation · Action & Adventure ⭐ 8/10

Right now you can watch Nadia: The Secret of Blue Water Season 1 on and — and it goes further with its ideas than most genre entertainment bothers to. A single, tightly-focused season means there is plenty to get through without ever feeling padded. Its 8/10 TMDB score, built from 92 ratings, reflects a title that consistently delivers. Watch it for Noriko Hidaka — the performance elevates material that could easily tip into self-seriousness. There is no real reason to keep putting it off.

Part of the current wave of titles people are actually watching, Nadia: The Secret of Blue Water Season 1 earns its spot. What makes Nadia: The Secret of Blue Water Season 1 work is that the ideas never crowd out the people having them. The series centers around Nadia, a young girl of unknown origins, and Jean, a young French inventor. Early in the story, the two protagonists are chased by Grandis Granva, Sanson, and Hanson, a group of jewel thieves who pursue Nadia for the blue jeweled pendant she possesses. After being rescued by Captain Nemo and his submarine, the Super Sea Cruiser Nautilus, the jewel thieves and the young protagonists join forces and participate in the struggle against the Neo-Atlantean forces, who seek to dominate the world. Noriko Hidaka and Yoshino Takamori lead a cast that brings real weight to the material. It was aired in 1990. What separates Nadia: The Secret of Blue Water Season 1 from lesser genre entertainment is a willingness to let the concept cost the characters something. It rarely drops the ball, and when it does, it recovers fast.

Nadia: The Secret of Blue Water Season 1 is satisfying on multiple levels — something to watch and something to think about after. It rewards viewers regardless of what else is in their watch history. The complete run is available and best experienced without too much prior knowledge of where it goes. Noriko Hidaka anchors it with a performance that makes the more abstract moments feel personal. If you have been burned by ambitious sci-fi before, this is the exception.

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🎬 Nadia: The Secret of Blue Water Season 1 — Episode Guide

E1
Girl at the Eiffel Tower
1990-04-13
Jean, a 14-year-old orphan, sailing into Paris to help his uncle design an airplane for the Paris Exposition's flight competition meets a pretty young girl named Nadia and her pet lion cub, King. He ends up rescuing her from a woman named Grandis who is trying to get Nadia's jewel, the Blue Water. N...
E2
The Little Fugitive
1990-04-20
With Grandis and her two accomplices, Sanson and Hanson, in pursuit, Jean takes Nadia back to his home in LeHarve. His grumpy aunt refuses to take Nadia in, but Jean lets Nadia stay at his own house. The following day, Jean and Nadia set off for Africa in one of his aeroplanes. They do not get fa...
E3
The Riddle of the Giant Sea Monsters
1990-04-27
Jean, Nadia, and King are rescued by an American battleship in pursuit of sea monsters, who have apparently been responsible for sinking ships. That night, the battleship is attacked, and Jean, Nadia, and King are thrown overboard....
E4
Nautilus, The Fantastic Submarine
1990-05-04
Jean, Nadia, and King are rescued by another vessel--an impressive and mysterious submarine known as the Nautilus (and yes, the captain's name is Nemo). Here, they learn from Nemo's pretty first officer, a young woman named Electra, that the vessel is in pursuit of a sinister enemy. After an unsuc...
E5
Marie's Island
1990-05-11
Jean, Nadia, and King are shot down over a strange island where they find themselves outrunning a squadron of sinister masked soldiers. In their struggle to survive, they find an orphan girl, Marie, who lost her parents to the soldiers.
E6
Infiltration of the Secret Base
1990-05-18
Marie and King are captured by the soldiers, so Jean and Nadia set off to a forbidding looking area to save them. Their rescue mission leads the pair to the base of the soldiers, who call themselves Neo-Atlantis, and their evil commander, Gargoyle, wants Nadia and her Blue Water at all costs.
E7
The Tower of Babel
1990-05-25
Imprisoned by the wicked Gargoyle, Nadia is forced to admit that she gave her Blue Water to Jean before turning herself in (to save Marie and King from a horrible fate). As the search for Jean is on, the boy desperately tries to find her. Simultaneously, Grandis, Sanson, and Hanson, who have also ...
E8
Mission to Rescue Nadia
1990-06-01
In a surprising turn of events, Grandis and her boys join forces with Jean to save Nadia, Marie, and King from Gargoyle. Their escape attempt nearly backfires, until the Nautilus shows up to save them....
E9
Nemo's Secret
1990-06-08
Jean, Nadia, Marie, and King are taken aboard the Nautilus with their new enemies-turned allies, Grandis, Sanson, and Hanson. Technophiles Jean and Hanson are thrilled to be aboard the Nautilus. Grandis becomes dangerously smitten with Captain Nemo, much to Sanson's consternation. Nadia, meanwhil...
E10
A Crowning Performance by the Gratan
1990-06-15
In pursuit of Gargoyle, the Nautilus becomes trapped in a dangerous underwater mine field. Sanson and Hanson jump aboard the Gratan to clear the mines before they detonate. Jean sneaks on to help the two men....
E11
New Recruits for the Nautilus
1990-06-22
Nemo and Electra appoint Jean, Nadia, and the others to new positions on the Nautilus. Jean is permitted access to Electra's library of books so that he can learn how to use the knowledge for mankind's benefit; simultaneously, he, Sanson, and Hanson are given a tour of the Nautilus. Marie and King...
E12
Grandis and Her First Love
1990-07-06
When the Nautilus docks on an island to reestablish supplies, Nadia bonds with Grandis when the latter tells her how the first man she fell in love with turned out to be a treacherous cad.
E13
Run, Marie, Run!
1990-07-13
Marie and King run off to explore the island, when they find themselves both lost and pursued by Gargoyle's soldiers. Sanson comes to their rescue.
E14
The Valley of Dinicthys
1990-07-20
Marie and Nadia become sick from a dangerously fatal tropical fever. To save them from death, Nemo charts course for an underground reef, where he takes Jean, Sanson, and Hanson on a quest to find the cure. Coming back, however, they have to deal with a territorial, eel-like Dinicthys....
E15
The Nautilus Faces Its Biggest Crisis
1990-07-27
Captain Nemo's vessel falls into yet another deadly trap set by Gargoyle--one which involves the Garfish and a surprise attack from American battleships. The subsequent damage costs the lives of several sailors--including a friendly young engineer named Ensign Fait. Jean, who had become friends wi...
E16
The Mystery of the Lost Continent
1990-08-24
The victims of Gargoyle's latest attack are taken to the long-forgotten underworld of Atlantis to be buried. While there, Jean discovers that his father's ship was sunk by the Garfish. Nadia also learns that she must keep the Blue Water at all costs, no matter what pain or damage it may cause.
E17
Jean's New Invention
1990-08-31
Jean is tired of being treated like a child by the Nautilus crew. Hoping to cheer him up, Nadia suggests Jean to build another aircraft. Inspired, he sets off to do just that. At first he is determined to construct the new helicopter by himself, but then realizes he still needs the support of som...
E18
Nautilus vs. Nautilus
1990-09-07
En route to Captain Nemo's home base of Antarctica, the Nautilus finds itself attacked by a territorial Nautilus shellfish.
E19
Nemo's Best Friend
1990-09-14
Nemo takes Jean and Nadia on a tour of his secret base, where he introduces the children to his closest friend, a talking whale named Irion, who hints at Nadia's responsibility to hold the Blue Water.
E20
Jean Makes a Mistake
1990-09-21
Jean's latest invention goes disastrously wrong and accidentally alerts the Garfish to attention. Nadia's detestation of Nemo and jealousy of Jean's friendship with Electra dangerously intensifies--until she finally learns that the Nautilus is merely fighting to destroy Gargoyle and that Electra po...

🎭 Cast of Nadia: The Secret of Blue Water Season 1

Noriko Hidaka
Noriko Hidaka
Jean Roque Raltique (voice)
Yoshino Takamori
Yoshino Takamori
Nadia la Arwall (voice)
Toshiharu Sakurai
Toshiharu Sakurai
King / Hanson (voice)
Yuko Mizutani
Yuko Mizutani
Marie en Carlsberg (voice)
Kumiko Takizawa
Kumiko Takizawa
Grandis Granva (voice)
Kenyu Horiuchi
Kenyu Horiuchi
Sanson (voice)
Akio Otsuka
Akio Otsuka
Nemo (voice)
Motomu Kiyokawa
Motomu Kiyokawa
Gargoyle (voice)
Kikuko Inoue
Kikuko Inoue
Electra (voice)
Chikao Ohtsuka
Chikao Ohtsuka
Giger (voice)

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