Pyrovile

The Pyroviles were humanoids with dry, cracked skins. They invade the country of Italy on Earth, triggering the eruption of Vesuvius (The Fires of Vulcan, The Fires of Pompeii). I is shown in trailers that they possess pshycic powers.

Behind the Scenes
Pyroviles are set to appear in Series 4, in the second episode of the series, "The Fires of Pompeii".