Caspian Sea

A map of the Caspian Sea pointing out Dagestan. (TV: The Waters of Mars)

The Caspian Sea was a large inland sea on Earth. According to Yuri Kerenski, it was technically more of a lake than a sea. Dagestan was located by the Caspian Sea (TV: The Waters of Mars) as was Tashkent. (AUDIO: The Memory Cheats)

Other realities

The Year That Never Was

In an alternate timeline during the Year That Never Was, the Saxon Master poisoned the sea. (TV: Last of the Time Lords) Martha Jones later visited it during her travels around the globe. (PROSE: The Story of Martha)

Behind the scenes

A map showing the Caspian Sea's location relative to Asia. (TV: Survivors of the Flux)

• The "Sea" which Tehraun overlooks, though only partially named on the map in Survivors of the Flux, is the Caspian Sea.