Episodes
39 episodes listed- 1The Young Girl of the Tour EiffelEiffel Tou no Shoujo13 Apr 1990
- 2The Little FugitivesChiisana Toubousha20 Apr 1990
- 3The mysterious giant monster of the seasNazo no Daikaijuu27 Apr 1990
- 4Nautilus, The Fantastic Submarine4 May 1990
- 5Marie's Island11 May 1990
- 6Infiltration of the Secret Base18 May 1990
- 7The Tower of Babel25 May 1990
- 8Mission to Rescue Nadia1 Jun 1990
- 9Nemo's Secret8 Jun 1990
- 10A Crowning Performance by the Gratan15 Jun 1990
- 11New Recruits for the Nautilus22 Jun 1990
- 12Grandis and Her First Love6 Jul 1990
- 13Run, Marie, Run!13 Jul 1990
- 14The Valley of Dinicthys20 Jul 1990
- 15The Nautilus Faces Its Biggest Crisis27 Jul 1990
- 16The Mystery of the Lost Continent24 Aug 1990
- 17Jean's New Invention31 Aug 1990
- 18Nautilus vs. Nautilus7 Sept 1990
- 19Nemo's Best Friend14 Sept 1990
- 20Jean Makes a Mistake21 Sept 1990
- 21Farewell Nautilus26 Oct 1990
- 22Electra the Traitor2 Nov 1990
- 23Young Drifters9 Nov 1990
- 24Lincoln Island16 Nov 1990
- 25The First Kiss30 Nov 1990
- 26King, the Lonely Lion7 Dec 1990
- 27The Island of the Witch14 Dec 1990
- 28The Floating Island21 Dec 1990
- 29King vs. King11 Jan 1991
- 30Labyrinth in the Earth25 Jan 1991
- 31Farewell, Red Noah1 Feb 1991
- 32Nadia's Love8 Feb 1991
- 33King's Rescue15 Feb 1991
- 34My Darling Nadia22 Feb 1991
- 35The Secret of Blue Water1 Mar 1991
- 36The New Nautilus8 Mar 1991
- 37Emperor Neo29 Mar 1991
- 38To the Sky5 Apr 1991
- 39Successor to the Stars12 Apr 1991
Episode names and air dates from the catalogue, synced by the product itself.