From: Star Trek: The Original Series

Caption: Kelvans aboard the Enterprise

Star Trek: The Original Series

Episode: TOS 050 - By Any Other Name

Planet: Kelva. Humanoid in appearance, the Kelvans' true appearance remains a mystery and remains unexplained. As refugees of a galaxy poisoned by heavy radiation, the Kelvans have assumed humanoid form, and are finding themselves beginning to show characteristics of the bodies they have assumed. The impression is that a Kelvan in true form, would never conduct themself in the manner that most humanoids do.

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