G-Force, a five-member superhero team, fights to defend Earth and its space colonies from the threat of the planet Spectra.

Science Ninja Team Gatchaman is a five-member superhero team that is composed of the main characters in several anime created by Tatsuo Yoshida and originally produced in Japan by Tatsunoko Productions and later adapted into several English-language versions. It is also known by the abbreviated name Gatchaman.

The original series, produced in 1972, was eponymously named Kagaku Ninja Tai Gatchaman and is most well known to the English-speaking world as the adaptation titled Battle of the Planets. The series received additional English adaptations with G-Force: Guardians of Space and ADV Films' uncut 2005 release. Tatsunoko also uses the official translation Science Commando Gatchaman, as shown in numerous related products and media. Because the English-language versions are notoriously inconsistent not only with one another but also with the original Japanese series, viewers most familiar with the English versions often experience some confusion upon re-examining the series after a long hiatus.

The original 1972 Kagaku Ninja Tai Gatchaman series was followed by an animated film, two sequel series, Gatchaman II, and Gatchaman Fighter. In the 90's, episodes from both series were dubbed into English by Saban as Eagle Riders. In 1994, the original series was remade as a condensed OVA series.

Tachikawa, Japan, is a "second metropolis" of Tokyo, protected by the Gatchaman, warriors who fight in special reinforced suits powered by the manifestation of their spiritual powers called NOTE. When the energetic and cheerful Hajime Ichinose becomes their newest member, the Gatchaman must deal with Berg Katze, an enigmatic alien creature bent on destroying Earth just like it did with several other planets in the past.

Emi is a seventeen-year-old girl living in Shibuya. Her father is always away with work and she's grown listless. Suddenly, a twist of fate involving a certain magical item changes everything. A mysterious pencil, of all things, is linked to the appearance of heroes from another world! Could this be the start to the excitement she's so desperately craving, or is there something more?

Earth is under siege from the alien menace known only by the name Cybercon and its legion of android forces, the Vorak. The Global Security Council convenes to address this problem, and calls upon Dr. Thaddeus Keane for assistance. They remember the aid they had received from Keane's special force, the Eagle Riders, in years past. Keane assures them that the Eagle Riders are still together, still strong, and armed with brand new weapons.

Eagle Riders is an adaptation of the Japanese series "Gatchaman II" and "Gatchaman Fighter", and is a sequel to the American show, "Battle of the Planets".

In the year 2066, the Republic of Hontworl, a charter member of the United Nations, leaves the organization without explaining its motives. This causes an outrage within the U.N. and places the security of the world on edge. Soon after this incident, Myori, the capital of the Republic of Triad, is attacked by a bird-like, flying fortress known as the Turtle King. The International Science Organization, which is headed by Dr. Kouzaburou Nanbu, is tasked to deal with this mysterious enemy. At the same time, the leading scientists of the ISO are disappearing. The five members of the Science Ninja Team, the Gatchaman warriors, are called upon to get to the bottom of things.