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Intelligent Lifeform Index

Four Letter Code zeta
Federation Status Hostile
Planet of Origin Zetar, near Klingon Space
Encountered By the USS Enterprise NCC-1701. "The Lights of Zetar" TOS.
T/E Rating T0/E0
Current Tech Level X
List of Named Zetarians

Full ILI GalleryPermitted Species Gallery

Class 1 Priority Alert

Starfleet Intelligence has designated this species a

Class 1 Priority

"We exist, powerful yet cursed to roam the galaxy seeking a body to inhabit, to regain the pleasures of life."
a Zetarian saying.
The Zetarian are a species who were on the verge of extinction. The last few survivors were forced to evolve into non-corporeal lifeforms due to a cataclysmic event that destroyed their homeworld. Now they float through space, a ticking time bomb of terror for any humanoid life form unlucky enough to wander into their path.

Home System

  • Quadrant: Beta
  • Location: Ski'Vanks Sector (coordinates B27-0005-1300)
  • Proper Name: Gius Masus
  • Star: It orbits a class D (White Dwarf) star
  • Distance from Star: N/A as all planetary bodies were destroyed
  • Companions: N/A. All planetary bodies destroyed, only asteroids remain.

Home World

  • Proper Name: Zetar
  • Diameter: N/A as planet was destroyed
  • Gravity: N/A as planet was destroyed
  • Axial Tilt: N/A as planet was destroyed
  • Orbital Period: N/A as planet was destroyed
  • Rotational Period: N/A as planet was destroyed
  • Classification: N/A as planet was destroyed
  • Surface Water: N/A as planet was destroyed
  • Atmosphere: N/A as planet was destroyed
  • Climate: N/A as planet was destroyed
  • Terrain: N/A as planet was destroyed
  • Population: Unknown but believed to be under 100.


When their planet began dying some time around the 14th century, the last hundred survivors planned on leaving the planet. Just as they were about to leave, however, one last cataclysmic event occurred, destroying their corporeal existence. They continued living as a pattern of lights and non-corporeal energy, containing their thoughts, desires, hopes, minds, and their very will to live.

Capable of high-warp speeds, this group took to traveling through space for a millennium, seeking a humanoid with a compatible physiology that they could inhabit and live out their lives through.

The Zetarians desired no cohabitation or symbiosis, but rather intended to take over a humanoid body outright, shoving aside the resident consciousness to make room for their own. They claimed they did not wish to kill, but those who resisted their takeover would die. In seeking out humanoids, they killed countless life forms by burning out sections of their brains, causing massive internal hemorrhaging. Their energy patterns also disrupted delicate computer systems.

In 2269, Memory Alpha was attacked by a body composed of ten Zetarians, who killed the entire population of researchers, scholars and specialists there and burned out large sections of the library's central brain and memory core, leaving a great deal of amassed Federation knowledge lost forever.

After the attack on Memory Alpha, the Zetarians returned to the USS Enterprise, and the specialist Mira Romaine, which they had tapped in an earlier encounter with the Enterprise. Mira appeared to possess the compatible physiology the Zetarians needed. When they attempted to possess her body, she was able to resist long enough for Scotty and Dr. McCoy to place her within Enterprise's pressure chamber. After adapting to the vacuum of space, the Zetarians were extremely susceptible to the increased pressure environment, and were quickly driven from Mira's body and destroyed


They have no form of government and do not seem to concern themselves with any form of social organization.


The Zetarians (or Zetars) were a race of once-corporeal beings from the planet Zetar. Now they are just a mysterious non-corporeal life form. They continued living as a pattern of lights and non-corporeal energy, containing their thoughts, desires, hopes, minds, their very will to live.


While they seek to take over corporeal forms they have evolved beyond the need for one.


The long eons of separation from outside stimulation that they use to enjoy as living beings may have had a long term effect on their mental stability or more likely their concepts of morality and right and wrong.


No records remain.


No records remain.


No records remain.


No records remain.


No records remain.


They have no use for technology.


They have no need for trade.


They have no military and no records remain to show if they once did.

Federation Intelligence Files

The Zetarians (or Zetars) were a race of once-corporeal beings from the planet Zetar. An unknown catastrophe on Zetar destroyed all corporeal life but separated out the intelligences of the dominant Zetarian humanoids. The surviving Zetarian entities have travelled space for millennia and may be completely immortal. They need no spacecraft and can travel up to .999c without assistance. All travelers should be warned that the Zetarians are seeking humanoid bodies to inhabit. When they find a physiologically compatible body they will take possession of it. The Zetarian presence can be removed by controlled decompression therapy. See file # TOS-2269-8312 for more data.


Both Memory Alpha and Memory Beta were used as referance sources as well as the TV Episode, TOS - The Lights of Zetar.


This file was updated and approved by the SDC on 17 December 2013

Content from this article may have
come partially, or entirely from
Memory Alpha

This profile was revised by the Species Development Committee.
REV 239401.31
Please add any new information discovered during the course of a mission or shore leave.