Tharos
From Tardis Wiki, the free Doctor Who reference
Tharos was the fourth planet of the Valerian system. It had three moons, the largest of which was called Krata.
It was inhabited by the Armidians. The Doctor knew of Tharos. Tharos, along with its star system, were destroyed in an interplanetary conflict around 1000 BC. (AUDIO: Vengeance of the Stones)
