Nadia: The Secret of Blue Water_
Original: ふしぎの海のナディア
In mankind's grasp for the future, a sinister foe known only as Gargoyle begins his plans to take over the world. Nadia, with the help of a young inventor, Jean Ratlique, and Captain Nemo of the submarine Nautilus, must fight to save the world from Gargoyle and Neo-Atlantis.
Network
NHK G
Episodes
39
Updated Feb 16, 2026
WHERE TO WATCH
Tubi
3 countries
Retrocrush
2 countries
A
AsianCrush
FREE
2 countries
Prime Video
2 countries
Anime Times Amazon Channel
1 country
dAnime Amazon Channel
1 country
DROPTHE_ GOSSIP
Overview
Nadia: The Secret of Blue Water has 1 season with 39 episodes spanning 1990-1991.
Cast
Noriko Hidaka →
Noriko Hidaka stars as Jean Roque Raltique (voice) in Nadia: The Secret of Blue Water.
Noriko Hidaka →
Year context
Nadia: The Secret of Blue Water first aired 36 years ago in 1990.
CAST (19)
Noriko Hidaka
Jean Roque Raltique (voice)
Yoshino Takamori
Nadia la Arwall (voice)
Toshiharu Sakurai
King / Hanson (voice)
Yuko Mizutani
Marie en Carlsberg (voice)
Kumiko Takizawa
Grandis Granva (voice)
Kenyu Horiuchi
Sanson (voice)
Akio Otsuka
Nemo (voice)
Motomu Kiyokawa
Gargoyle (voice)
Kikuko Inoue
Electra (voice)
Chikao Ohtsuka
Giger (voice)
Hiroshi Masuoka
Jean's Uncle (voice)
Hitoshi Takagi
Irion (voice)
Kaneto Shiozawa
Emperor Neo (voice)
Kappei Yamaguchi
Hamahama (voice)
Tamio Ohki
Doctor Woolar (voice)
Teiji Ōmiya
Captain Mayville (voice)
Toshihiko Seki
Fejto (voice)
Tsukasa Itou
Fuzzy (voice)
Koichi Yamadera
Ayerton (voice)
SEASONS (1 season, 39 episodes)
SEASON 1
01
Girl at the Eiffel Tower
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…
02
The Little Fugitive
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…
03
The Riddle of the Giant Sea Monsters
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,…
04
Nautilus, The Fantastic Submarine
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,…
05
Marie's Island
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…
06
Infiltration of the Secret Base
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…
07
The Tower of Babel
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…
08
Mission to Rescue Nadia
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…
09
Nemo's Secret
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…
10
A Crowning Performance by the Gratan
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…
11
New Recruits for the Nautilus
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…
12
Grandis and Her First Love
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…
13
Run, Marie, Run!
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.
14
The Valley of Dinicthys
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…
15
The Nautilus Faces Its Biggest Crisis
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…
16
The Mystery of the Lost Continent
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…
17
Jean's New Invention
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.…
18
Nautilus vs. Nautilus
En route to Captain Nemo's home base of Antarctica, the Nautilus finds itself attacked by a territorial Nautilus shellfish.
19
Nemo's Best Friend
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…
20
Jean Makes a Mistake
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…
21
Farewell Nautilus
The Nautilus is ensnared by Gargoyle's super powerful SeaNet magnet. In the fight that follows, Grandis, Sanson and Hanson escape on the Gratan (to help…
22
Electra the Traitor
After relocating Jean, Nadia, Marie, and King to his personal quarters (which he will later jettison from the doomed Nautilus), Nemo finds Electra holding a…
23
Young Drifters
Jean, Nadia, Marie, and King are shipwrecked on a deserted island. They decide to make it their home for a while.
24
Lincoln Island
Now that they are settled into their new island home (which they dub "Lincoln Island", Jean uses his knowledge and technology to bring a little…
25
The First Kiss
As a result of Nadia's foolishness, the children only have meat for food. This infuriates Nadia so much that she declares to starve... until she…
26
King, the Lonely Lion
King gets jealous of Jean and Nadia becoming more intimate and runs away. Jean sets off to find him... but not before Nadia goes ballastic…
27
The Island of the Witch
After surviving a typhoon, Jean, Nadia, Marie, and King discover another island drifting mysteriously toward them. Exploring it, the children find Ayerton, a flaky scientist…
28
The Floating Island
Jean, Nadia, Marie, and King are reunited with Grandis, Sanson, and Hanson. Together they all decide to live as a family on the new island,…
29
King vs. King
A violent row between Sanson and Hanson turns into a race between two mechanical lions resembling King(!).
30
Labyrinth in the Earth
Four months afterward, the Gratan is nearly repaired, and soon our pals will set off for Africa. But first Jean and Nadia go off on…
31
Farewell, Red Noah
Trapped inside a mysterious chamber, Nadia learns from a disembodied voice that their island home is actually a space satellite, Red Noah--and that she is…
32
Nadia's Love
Having escaped their former island home, our pals crash-land into an African tribal village, where they are instantly captured... until one of its citizens recognizes…
33
King's Rescue
When King gets captured by Grandis' ex-fiancee, our pals set off to save him.
34
My Darling Nadia
Jean writes a song for Nadia. Actually, our pals burst out into song while various clips from the show play out.
35
The Secret of Blue Water
Finally, our pals arrive at Nadia's real homeland--Tartessos. As they tour through its long forgotten ruins, our heroine finally reveals her darkest secrets... including who…
36
The New Nautilus
Gargoyle's battleships appear over Tartessos. To save Jean and the others, Nadia surrenders herself... but not before Jean swears to save her. Forced to flee…
37
Emperor Neo
Gargoyle takes Nadia before the puppet leader of Neo-Atlantis, Emperor Neo, who reveals that he has a strong connection with both Nadia and Nemo. Eight…
38
To the Sky
The New Nautilus and Gargoyle, now aboard Red Noah, face off in a spectacular duel of pyrotechnics, lasers, and, ultimately, wills. Midway through, both crafts…
39
Successor to the Stars
All the pieces fall into place for the final stage of Jean and Nadia's journey around the world, Nemo and Gargoyle's long-standing feud, and the…
SERIES INFO
1
Seasons
39
Episodes
25 min/ep
Per Episode
Ended
Status
NETWORKS (1)
NHK G
DETAILS
FREQUENTLY ASKED QUESTIONS
What is Nadia: The Secret of Blue Water about?
In mankind's grasp for the future, a sinister foe known only as Gargoyle begins his plans to take over the world. Nadia, with the help of a young inventor, Jean Ratlique, and Captain Nemo of the submarine Nautilus, must fight to save the world from Gargoyle and Neo-Atlantis.
Where can I watch Nadia: The Secret of Blue Water?
Nadia: The Secret of Blue Water is available on Tubi, Retrocrush, AsianCrush, Prime Video, Anime Times Amazon Channel. Availability varies by region.
How many seasons does Nadia: The Secret of Blue Water have?
Nadia: The Secret of Blue Water has 1 season with 39 episodes total.
Who stars in Nadia: The Secret of Blue Water?
The cast of Nadia: The Secret of Blue Water includes Noriko Hidaka, Yoshino Takamori, Toshiharu Sakurai, Yuko Mizutani, Kumiko Takizawa.
What is the rating of Nadia: The Secret of Blue Water?
Nadia: The Secret of Blue Water has a rating of 7.5 out of 10 based on 89 votes on TMDB.
Is Nadia: The Secret of Blue Water still running?
Nadia: The Secret of Blue Water has ended. The final episode aired on .
GENRES (5)
Animation
Action & Adventure
Sci-Fi & Fantasy
Drama
Family
