The Beast (The Impossible Planet)

The Beast said that he had many names, including Satan. He claimed that he remained imprisoned since before the universe.

Physical form
When the Doctor encountered him, the Beast resembled a gargantuan crimson horned figure with a corpse-like face, bound by chains. While possesed by the Beast, its hosts had eyes with crimson pupils.

Powers and abilities
The Beast could manifest himself through electronic media, including computer voices and, crudely, through hologram viewers. Its mind could leave its body and possess a single hive mind of the Ood collectively or a single Human individually, though not more than one at one time. He had the power of telepathy and, through a host, telekinesis and manifest fire from his mouth. His hosts could also physically survive vacuum for minutes at a time. (DW: The Impossible Planet/The Satan Pit)

History
Though the exact circumstances are unknown, it is known that the Disciples of the Light confined the Beast to the planet later known as Krop Tor and placed the planet in orbit around the black hole K37 Gem 5. If he ever tried to escape, the field holding the planet in orbit would stop and the planet would be sucked into the black hole.


 * The Beast claimed to have existed before the Universe, a claim the Doctor found difficult to accept. It may have originated in the last Universe.

The Beast spread his influence throughout the cosmos. the Beast religions which have a Devil or demon are claimed to be based on him. (DW: The Impossible Planet, The Satan Pit)

It also had a son, known as Abaddon. (TW: End of Days)


 * Some also called the Beast itself Abbadon. The Beast had an unknown relationship with the Ood, who said that they served as his Legion.

The Beast possessed Toby Zed, a crew member of the Walker Expedition Sanctuary Base, via the text transcribed into the Krop Tor Notebook.

Through Zed, the Beast's first action was to kill Scooti Manista by breaking one of the windows (the Beast and those he possesses can survive in a vacuum for at least a few minutes). The Base's Ood were taken over. Upon the Ood's defeat, the Beast planned to escape by keeping his spirit in Toby's body, leaving his body behind. The Doctor deactivated the force holding Krop Tor in orbit.

The Beast's original body was destroyed when Krop Tor fell into K37 Gem 5 and his spirit was destroyed when Toby's body was pulled into K37 Gem 5. (DW: The Satan Pit)