Trion (species)

Turlough, a Trion political prisoner.

The Trion are a race of humanoids from Trion. They look identical to Humans and can survive in similar conditions.

Since the nurse at Turlough's school had no problem when examining Turlough, that would imply that Trions have similar, if not identical, internal structure to Humans. (DW: Mawdryn Undead) Based on Turlough's comments, he may be older then he looks, implying a different aging rate. (DW: Terminus)

The Trions are a reasonably advanced species, having space-faring capabilities and energy weapons. They also had colonies and representatives on many planets in the galaxy (including Earth, Sarn, Darvey and Verdon). Despite this, many of these colonies were poorly maintained or forgotten, such as in the case of Sarn. Following a civil war on Trion, the losing side and their families were sent to various other planets. These political criminals were marked with the Misos Triangle and were watched over by the Custodians. This practice was later abandoned and the prisoners were allowed back to Trion. (DW: Planet of Fire)