Nadia: The Secret of Blue Water - Season 1 Episode 3 : The Riddle of the Giant Sea Monsters
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.
First Air Date : Apr 13, 1990
Last Air Date : Apr 12, 1991
Runtime : 25 min.
Genre : Animation, Action & Adventure, Sci-Fi & Fantasy, Drama, Family
Stars : Noriko Hidaka, Yoshino Takamori, Toshiharu Sakurai, Yuko Mizutani, Kumiko Takizawa, Kenyu Horiuchi, Akio Otsuka, Motomu Kiyokawa, Kikuko Inoue, Chikao Ohtsuka, Hiroshi Masuoka
Quality : 
- Eps. 1 : Girl at the Eiffel Tower1990-04-13
- Eps. 2 : The Little Fugitive1990-04-20
- Eps. 5 : Marie's Island1990-05-11
- Eps. 7 : The Tower of Babel1990-05-25
- Eps. 8 : Mission to Rescue Nadia1990-06-01
- Eps. 9 : Nemo's Secret1990-06-08
- Eps. 11 : New Recruits for the Nautilus1990-06-22
- Eps. 12 : Grandis and Her First Love1990-07-06
- Eps. 13 : Run, Marie, Run!1990-07-13
- Eps. 14 : The Valley of Dinicthys1990-07-20
- Eps. 17 : Jean's New Invention1990-08-31
- Eps. 18 : Nautilus vs. Nautilus1990-09-07
- Eps. 19 : Nemo's Best Friend1990-09-14
- Eps. 20 : Jean Makes a Mistake1990-09-21
- Eps. 21 : Farewell Nautilus1990-10-26
- Eps. 22 : Electra the Traitor1990-11-02
- Eps. 23 : Young Drifters1990-11-09
- Eps. 24 : Lincoln Island1990-11-16
- Eps. 25 : The First Kiss1990-11-30
- Eps. 26 : King, the Lonely Lion1990-12-07
- Eps. 27 : The Island of the Witch1990-12-14
- Eps. 28 : The Floating Island1990-12-21
- Eps. 29 : King vs. King1991-01-11
- Eps. 30 : Labyrinth in the Earth1991-01-25
- Eps. 31 : Farewell, Red Noah1991-02-01
- Eps. 32 : Nadia's Love1991-02-08
- Eps. 33 : King's Rescue1991-02-15
- Eps. 34 : My Darling Nadia1991-02-22
- Eps. 35 : The Secret of Blue Water1991-03-01
- Eps. 36 : The New Nautilus1991-03-08
- Eps. 37 : Emperor Neo1991-03-29
- Eps. 38 : To the Sky1991-04-05
- Eps. 39 : Successor to the Stars1991-04-12
