Release Message:  The TARDIS materializes aboard a desert planet mining ship run by a robots. As a crewman is discovered strangled to death, the Doctor (Tom Baker) and Leela become the prime suspects.

Description:  The TARDIS materializes aboard a sandminer, a mining ship on a desert planet run by a robot labor force headed by a fairly small but sniping human crew. As one crewman is discovered strangled to death, the Doctor and Leela arrive just in time to become the prime suspects.