Skeletoid

The Skeletoids were suits which could take over their wearers. They required a living Human in order to function. These Humans would be mind-controlled and preserved by the suit, though they would look like decayed corpses.

They have emerged as a serious threat to even the Daleks and the Cybermen (DWM: Kane's Story, Frobisher's Story)

Behind the scenes

 * Skeletoids were similar in appearance to the Vashta Nerada who ate humans in their spacesuit, leaving only their skeletons, and were able to control of the suit as well. (DW: Silence in the Library/Forest of the Dead) They also resembled Skeleton Crew (DW: The Infinite Quest)