Ep. 21: Nautilus trapped in trench faces magnetic weapon and battleship assault
Aired on October 26, 1990

21
The Nautilus survives a torpedo attack by six Garfish in the Kermodec Trench before Nemo destroys the fleet. Gargoyle then uses the SeaNet Beam Gun to lift the submarine toward his Neo-Atlantean battleship. Damage from an atomic vibrator weakens the Nautilus, prompting Electra to suggest self-destruction. Grandis opposes this, claiming she wants to die with Captain Nemo because he will never love her. The Grandis gang sabotages the battleship's missile tube using an annihilation bomb while Jean rescues Nadia from surrendering. The Nautilus engineers destroy Gargoyle's weapon with their final missile. The damaged submarine enters a whirlpool as Gargoyle orders another Garfish fleet to finish them off.
Episodes
- Ep. 17 · Jean Builds an Aircraft to Impress Nadia Despite Obstacles
- Ep. 18 · Captain Nemo sails the Nautilus to Antarctica to repair damage from Gargoyle while escaping a giant squid.
- Ep. 19 · Nemo shows Jean and Nadia his base, revealing an ancient whale friend and a future revelation.
- Ep. 20 · Jean's Glider Fails and Nadia Learns Electra's True Feelings
- Ep. 21 · Nautilus trapped in trench faces magnetic weapon and battleship assault
- Ep. 22 · Electra confronts Nemo over Tartessos while the Nautilus sacrifices itself to destroy the Garfish fleet.
- Ep. 23 · Jean, Nadia, Marie, and King survive shipwreck on deserted island
- Ep. 24 · Nadia names their new home Lincoln Island after the president and struggles to survive in the forest.
- Ep. 25 · Nadia starves after stealing food while Jean hallucinates in a cave