Toclafane
The Toclafane where a race of fairy tale monsters from Gallifrey made up by The Master (The Master was in the form of Harold Saxon)
In 2008 The Master claimed to the public that he had contacted a alien race. But using a paradox machine conected to the TARDIS to allow the race to come through to Earth and to decimate Humans and to create a Time Lord Empire.
At the end of Last of the Time Lords it was revealed that the Toclafane where Human based cyborgs from the episode Utopia which where sent of in a rocket at the end of the episode Utopia.
The Toclafane is a joke on the Disney charecter, Toclafane which looks similar although is a lot more friendly.