One of the survivors, a young child known as Sammy, whose gender is purposefully left ambiguous, but is implied to be a hermaphrodite, is captured by X and rapidly aged into the bizarre and androgynous new commander of Galactor, known as Giersadora, acting as a replacement for Berg Katze from the first series after his suicide.

In the midst of the revival of Galactor, the Science Ninja Team is called back into action, with a shady man known as Hawk Getz acting as the replacement for Joe.

In 1980, a compilation film called Eagle 5 Brothers (독수리 5 형제, Dokksuri Hyeongje) was made based on Gatchaman II and Fighter.

However, there were subtle changes made that are characteristic of remastering which included different hair colors, uniforms, and a complete redesign of Dr. Pandora's child as a boy, despite their gender in the original being left ambiguous.

Elements removed from the series included the Queen Margaret cruise ship disaster in the first episode, along with the transformation of Sammie Pandora into Giersadora (called Mallanox in the dub and initially stated as being male).

Scenes depicting destruction in cities were also edited to remove references to death, and the Galactor soldiers (now christened Vorak) were said to be androids and would be "deactivated" instead of having been killed.

To segue the two series together, Giersadora's death at the end of Gatchaman II was edited and rewritten so that instead of dying, "Mallanox" is instead transformed further by Cybercon (Leader X) into a new form called Happy Boy (originally Count Egobossler, the nemesis in F).