Karaknid

 was one of the planets manipulated by the self-styled Rulers of the Universe. To achieve their goals, the Rulers implemented a flood to cause crop failure on Karaknid.

When River Song encountered some of the native species, they had developed stock markets and a mining industry, but not space travel. They were not aware of other civilisations.

One of the rulers, Jenkins, kidnapped several locals to observe their shock at experiencing the technological advances on the Party ship. In the end, he chose Spritz to keep him company for a period of time. (AUDIO: I Went to a Marvellous Party.)