Phantom Zone

The Phantom Zone is a fictional dimension in the DC Comics universe, primarily associated with Superman and other Kryptonians. It serves as a prison for Kryptonian criminals and is often depicted as a desolate, shadowy realm where time flows differently and inhabitants are trapped in a state of suspended animation.

 Publication history 
The Phantom Zone was first introduced in Action Comics #23 in 1960 by writer Jerry Siegel and artist Joe Shuster.

 Function 
It's used to imprison dangerous criminals without killing them. Once placed in the Phantom Zone, individuals can no longer interact with the physical world but can still be observed.

 Entry and exit 
Characters can enter the Phantom Zone through a device called the Phantom Zone projector, which emits a beam that can transport individuals there. Escape usually involves unique circumstances or interventions from characters with special powers.

 Kryptonian lore 
The Zone is an integral part of Kryptonian history and culture, often linked to stories about Superman’s past and the fate of Krypton’s criminals, like General Zod and his followers.

 In other media 
The Phantom Zone has been featured in various adaptations of Superman, including movies, animated series, and television shows like Smallville and Supergirl.