Bellus IV

Bellus IV was a planet which was home to a war between humans and robots. The Seventh Doctor arrive here and a human commander, Deldran, quickly took him to the human headquarters. There, the remains of a great experiment to simply turn off the robots had been halted by the death of the chief scientist. The Doctor finished the work, fliped the switch — and promptly discovers that the "human" side were robots, too. As he powered down for good, Deldran explained that the humans died ages ago, leaving the war running by robot proxy. When Deldran used his last bit of power to explain that the robots wouldn't have known what to do with peace, the Doctor echoed the sentiment. He wondered if anyone is really built for peace. (IHP: War World)