The Thoros Alphans are the native humanoids from the planet Thoros Alpha. A primitive culture, externally indistinguishable from Humans; they have long been enslaved by the amphibianoid Mentors of Thoros Beta. The two species are not compatible in terms of tissue transplantation.
- Doctor Who season 23 - The Trial of a Time Lord, episodes 5 - 8, a.k.a. Mindwardp (1986)