Scalos

From Memory Alpha, the free Star Trek reference.

Scalos is a class M planet located in the outer quadrants of the galaxy, homeworld of the humanoid Scalosians.

The population was destroyed by radiation poisoning. The planet had a population of 900,000, and had a rating of 7 on the Industrial Scale before 2267. When it was visited by the Starfleet vessel Enterprise (TOS: "Wink of an Eye"), only five hyperaccelerated individuals remained.

For the 2006 remastered version of "Wink of an Eye", the generic planet representing Scalos (also seen as Argelius II) was replaced with a unique, computer-generated version. The cityscape on the surface of the planet was also replaced with a new, high definition matte painting - the original had been a reuse of the Eminiar VII city from "A Taste of Armageddon".