Doctor Who: The Robots of Death (TV)

A science fiction murder mystery in the claustrophobic confines of a craft that trawls through deserts and duststorms in search of rare metals. A small human crew lives in luxury aboard the miner, surrounded by their obedient robot slaves. The strictest safeguards for people are built into every robot's programming. So when one of the miner crew is murdered, suspicion falls on two new arrivals... The Doctor and Leela. To make things more complicated, more than one of the crew is aboard for reasons other than turning sand into money. Even one of the robots has a mission of its own. As the bodies pile up, the Doctor soon realises that perhaps the killer isn’t human.