Battle of the Planets cast five young people as G-Force, consisting of Mark, Jason, Princess, Keyop, and Tiny. G-Force protects Earth from planet Spectra and other attacks from beyond space. The most prominent field commander of the Spectra forces was a villainous, masked individual known as Zoltar, who received his orders directly from the "Luminous One". Battle of the Planets is an American adaptation of the Japanese anime series Science Ninja Team Gatchaman.