Ace test pilot Hal Jordan, who leads a secret life as Earth's guardian Green Lantern, is called back to Oa. Searching for the culprits behind a series of Green Lantern deaths in "Frontier Space", Hal and his gruff fellow Green Lantern Kilowog “commandeer” The Interceptor, a prototype spaceship powered by pure Green Lantern energy and an advanced artificial intelligence system that Hal names Aya. Hal and Kilowog later discover that a group of Red Lanterns, including the conflicted Razer and the vile Zilius Zox have been targeting and eliminating Green Lanterns in Frontier Space. Along with the help from a surviving Frontier Space Green Lantern Shyir Rev, Hal and Kilowog must stop the Red Lantern leader Atrocitus from destroying Shyir's home planet of Colony 12.
In the end, Shyir sacrifices himself to allow Kilowog to save the inhabitants of his world, who are resettled on a new world named Rev, while a repentant Razer is captured by Jordan while attempting 'Suicide by Lantern'. With Aya's drive system damaged and requiring 9 months to self repair, Kilowog and Jordan set out to stop the Red Lanterns themselves, while debating what to do with the captive Razer.
Hal and company go back to Betrassus and discover that Iolande's brother Prince Ragnar has been recruited into the Red Lantern Corps and usurped his sister's throne. The Red Lanterns plan to detonate the planet so Hal and the others work with the Betrassan resistance. Meanwhile, Ganthet is exiled from the Guardians when he tries to convince Appa Ali Apsa to reveal the truth behind the Red Lanterns' hatred of the Guardians. Before he can be banished, however, Sayd retrieves him and helps him enact an experimental weapon: a Blue Lantern Power Battery, powered by Hope. The Battery supercharges Hal, Kilowog and Iolande while rendering Razer and the other Red Lanterns powerless. The Lanterns remove the bomb from Betrassus and the Blue Lantern Power Batteryflies away, presumably in search of a bearer. Ganthet assures Sayd that his hope is that the Green Lanterns succeeded in saving Betrassus before he finally departs from Oa.
- In the Animated Series, Appa represents the staunch adherence to rules, and is the antagonist amongst the Guardians of the Universe towards Hal Jordan.
- "Beware My Power" Part-1 and Part-2
- "Regime Change"
- "Flight Club"