The third episode of HBO's Lanterns, titled "OutKast," departs from its central storyline to explore the backstory of John Stewart, revealing that the Guardians of the Universe deliberately engineered his path to becoming a Green Lantern. Rather than being chosen at random by a ring, as is traditional, John was raised from infancy by his parents to be fearless after a Guardian identified potential in his father and asked his mother to condition their son accordingly. The episode raises questions about how much backstory the series needs, while confirming that the Guardians operate with a hidden agenda that predates Sinestro's coup.

The episode intercuts a 2016 interview between John and a Guardian (Laura Linney) with flashbacks showing his father's own brush with becoming a Lantern, his subsequent mental breakdown, and his wife Bernadette's decision to raise John without fear at the Guardian's urging. It also recounts John's final Marine mission, tracking a target codenamed "Grey Wolf" in Russia, which led to his recruitment. The episode expands the mythology around how Lanterns are chosen and deepens the Stewart family's tragic history, though it delays the anticipated confrontation between Hal Jordan and Sinestro teased at the end of the previous episode.