An unnamed planet located in the space of the galaxy's Alpha or Beta Quadrant was the homeworld of a pre-industrial humanoid species. It was ruled oppressively by the Inquisitors, who punished heretics and dissidents with torture, believing them to be in league with the Dark One. They were opposed by a group of rebels.
In 2268, the Federation shuttlecraft Galileo, carrying James T. Kirk, Spock, Leonard McCoy, Pavel Chekov and Claire back to the USS Enterprise, hit a meteor storm and crashed on the planet in a forest outside a city. The Inquisitors discovered the shuttlecraft while the Enterprise crew were absent and seized equipment from it, including the radio. Kirk and the others worked with the rebels to get their technology back, ending the Inquisitors' rule in the process. (TOS comic: "Day of the Inquisitors")