In the series premiere episode, Seg learns that his home planet of Krypton has been targeted by the world-consuming alien known as Brainiac, so that his future grandson – the greatest hero of all time – will never be born.

After suffering a tragedy, Seg adjusts to the realities of his mission, as well as his newfound rank in the Guilded class, and a new threat. He vows to direct all of his energy toward saving Krypton from Brainiac – as the last son of House El.

To quell Rankless unrest, the Voice of Rao begins Kandor’s Nova Cycle festival and finds a scapegoat for the failed Rankless Initiative. Meanwhile, Seg is approached by a mysterious Black Zero leader.

Fighting for survival within the heart of Black Zero, Seg finds a window into Krypton’s ancient past, but learns that his life may be in danger. Meanwhile, Jayna-Zod (series star ANN OGBOMO) grapples with her torn loyalties as she considers an offer from House Vex.