Ep. 37: Nadia returns to Red Noah and discovers her brother Neo is a puppet controlled by Gargoyle.
Aired on March 29, 1991

37
Nadia is taken aboard the Red Noah, which hovers in the sky and dwarfs Gargoyle's battleships. Gargoyle reveals the ancient history of Atlantis, showing an experimental massive human named Adam and failed creations in jars. Nadia meets Emperor Neo, who is revealed to be her long-lost brother, now a mechanical puppet under Gargoyle's control. Meanwhile, the New Nautilus survives the destruction of Tartessos and prepares to fight back. Neo threatens the world to surrender England, but just as the weapon fires, the New Nautilus intervenes, bringing the two crafts face to face.
Episodes
- Ep. 33 · King captured by Grandis' ex-fiance, companions launch rescue mission
- Ep. 34 · Clip show featuring image songs and Sanson's suggestion for Jean to write a love song for Nadia
- Ep. 35 · Nadia Discovers Her Atlantis Heritage and Blue Noah Identity in Tartessos
- Ep. 36 · The New Nautilus
- Ep. 37 · Nadia returns to Red Noah and discovers her brother Neo is a puppet controlled by Gargoyle.
- Ep. 38 · Red Noah and New Nautilus battle in Paris and space, leading to Nadia's capture by Gargoyle.
- Ep. 39 · Neo sacrifices himself to free Nadia, leading to Gargoyle's demise and Jean's revival.