Failure’s one of the basic freedoms.
Odds are good in Doctor Who that the robot did it. And if the robot is a butler, as in Chris Boucher’s “The Robots of Death” (Story Production Code 4R), then there’s no question who the murderer will be. Though the title sort of gives it away, too.
Boucher’s second story, following “The Face of Evil” just prior, even manages the neat trick of keeping the real villain hidden until the third of four episodes, sadly with the unfortunate side effect that the events of the first three segments serve mostly as action-flavored filler.
After the Doctor gives Leela an impromptu lesson on trans-dimensional engineering, the TARDIS materializes inside an enormous ground vehicle, a sand miner crawling across a forbidding desert landscape in search of zelanite, a rare and valuable mineral. Staffed predominantly by robots, with a small, coddled human crew to oversee them, the miner has been trawling these wastes for eight mostly uneventful months, but the moment the TARDIS arrives, one of the human crew is murdered.
There’s no mystery in it—veteran director Michael Briant films the attack from the robot’s blurry point of view. Given the establishing scenes of the crew discussing how utterly impossible it would be for a robot to harm a human, cribbing from Asimov’s Three Laws of Robotics, the story’s primary question becomes how the robot was able to kill one of the human crew. The violation of this prime directive would mean the end of their civilization, dependent as it is on robot labor for most of its functioning.
Boucher and the production team go to great lengths to sketch out a decadent human culture primarily concerned with the acquisition of wealth and prestige. Surrounded by opulence and art, the crew dons unwieldy headgear when performing their assigned tasks on this two year expedition, the symbols of their individual status and position never far from hand—or head. Even when alerted to a murder, the commander of the miner, Ulanov (Russell Hunter), insists that they continue pursuing a rich zelanite deposit before focusing on the fact that someone in their isolated environment has evil intent. He’d sooner return to base with full ore tanks than a full crew, and he almost gets his wish…