- For the episode, see The Phantom Zone.
The Phantom Zone is an interdimensional realm existing outside of space and time.
The Phantom Zone appears as a disorienting realm of mirages and whispers, constantly projecting glimpses of potential futures in the real world.
"The Phantom Zone"
Dru-Zod reveals that Val-El did not perish, but rather escaped into the Phantom Zone, and he encountered Val and betrayed him, stealing his device to escape and leaving him behind. Realizing that Val might be needed to save Kandor from Brainiac, Dru brings Val out of the Phantom Zone. Later on Dru attempts to bargain with Brainiac for the preservation of Krypton in exchange for Val and his knowledge of the future, and although Brainiac agrees, Brainiac is sent into the Phantom Zone by Seg-El before he could capture Val, drawing Seg into the Phantom Zone along with him.
"Light-Years From Home"
Once in the Phantom Zone, Seg wanders aimlessly, tormented by the potential futures he sees in the Zone. Appearing before Seg disguised as a "hallucination" of Val-El, Brainiac convinces Seg to use his sunstone to open a wormhole into the real world, revealing himself to Seg just as they are both drawn back out of the Phantom Zone.
- Welsh, Cameron (writer) & Donnelly, Ciaran (director) (March 28, 2018). "House of El". Krypton. Season 1. Episode 2. Syfy.
- Fiveash, Chad & Stoteraux, James & Welsh, Cameron (writers), Donnelly, Ciaran (director) (May 23, 2018). "The Phantom Zone". Krypton. Season 1. Episode 10. Syfy.
- Goyer, David S. & Welsh, Cameron (writers), Roskin, Marc (director) (June 12, 2019). "Light-Years From Home". Krypton. Season 2. Episode 1. Syfy.