Blon Fel-Fotch Passameer-Day Slitheen

	Margaret Blaine
	Raxacoricofallapatorius
	DW: Aliens of London DW: World War Three DW: Boom Town
	[[actor::Annette Badland (as Margaret Blaine)|Annette Badland]]

Blon Fel-Fotch Passameer-Day Slitheen is a member of the Slitheen family who took on the body / skin of a human called Margaret Blaine when the family Slitheen attempted to trigger nuclear devastation on Earth. (DW: World War Three)

Blon escaped the destruction of Downing Street and set up in Cardiff and began the Blaidd Drwg nuclear power plant project with the purpose of using a Tribophysical waveform macro-kinetic extrapolator to escape Earth.