The Zetarians are a race by now exctinct. When their world blowned up, they fromed a collective entity formed by emotions of last Zetarians. This collective mind was seeking for a body to transfer to, but when they try to keep control of a human (or Tellarite or Andorian) they destroy his mind causing the death in few moments.
The Zetarians were able to move faster than the speed of light.




A Man possessed by Zetarians does have lights in his eyes, but when trying to avoid the mind possession he does change colour in his face and wheeze before death...

Zetarians were exctinct in stellar date 5725.3

Referring episode : The Lights of Zetar

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