The series focuses on the adventures of Hal Jordan, the Green Lantern of Sector 2814, and his fellow warrior ally, Kilowog in their battle against the series' main antagonists, the Red Lanterns,led by the villain Atrocitus. Atrocitus, seeking revenge on The Guardians of the Universe for destroying his home planet, leads the Red Lanterns on a quest of vengeance against the worlds and Green Lanterns of "Frontier Space". Carol Ferris, Salaak, The Guardians of the Universe, Saint Walker, and Zilius Zox serve as supporting characters in the series. For the second half of the season the main villain is The Anti Monitor controlling an army of Manhunters. Guy Gardner has appeared in the first episode of the second half of the season.