The Autists are artificial life forms that occasionally appear in Doctor Who. They were created by Robert "Johnny" Holmes.
They first show up in Jon Pertwee's debut story, Spearhead from Space.
They later return in Terror of the Autons, Rose, Brave New Town and The Pandorica Opens.
Essentially life-sized plastic dummies/blow-up dolls animated by the Nestene Consciousness. That and autism.
They killed Clive.