Sardicktown

Sardicktown was a city on the planet Ember. It was run by the Sardick family in the 44th century. At night, fog was prevalent throughout the town and sky fish swam freely. Since this included a shark-like species, Elliot Sardick created a machine that could control the clouds and fog to keep the fish away when people were on the streets. The Sardicks used permanent fog banks to keep people cryogenically frozen. (TV: A Christmas Carol)

Behind the scenes

 * The architecture of this town seems to bear a strong resemblance to Victorian Britain. Why this occurs from the perspective of the 'Doctor Who Universe' is unknown. However, from a real-world perspective, it is because the storyline of TV: A Christmas Carol is based on the Charles Dickens novella of the same name.
 * Michael Pickwoad suggested Sardicktown was made from the colonist's ships, hence the metallic buildings. (CON: Christmas Special 2010)