Mister Dread

Mister Dread was a member of the Alliance of Shades he was part of a mission to stop Humans from realising the truth about the Gray aliens. He tracked down the Doctor, Cassie Rice and Jimmy Stalkingwolf and was killed by Night Eagle. He managed to rebuild himself and retrieve the 'ionic fusion device', bringing it back to Dreamland, where he was destroyed by the Sonic screwdriver. (DW: Dreamland) The Doctor (probably jokingly) referred to the other three robots as Mister Terror, Mister Fear, and Mister Apprehension.