Atrion

From TARDIS Index File, the free Doctor Who reference.

Atrion
Appearance / Type:	Near-Human
Also known as:
Affiliated with:	Zeos
Place of origin:	Atrios
Appearances:	DW: The Armageddon Factor
Mentioned in:
Notable Individuals:	Astra, the Marshall, Shapp, Merak

The Atrions were the Near-Human species native to Atrios. They were led by a royal family, who included the Princess Astra. During the war with Zeos, they were also led by the Marshall.

The Atrions had a twin planet, Zeos, which they originally traded with peacefully. At some point, a nuclear war started between them and lasted for 5 years. (DW: The Armageddon Factor)