Doctor Who. The Wheel of Ice

Set on a mining colony encircling a moon of Saturn, the story unfolds amidst rising tensions from equipment failures and mysterious thefts. Children speak of strange creatures, and fears keep workers from the mines. When the Doctor and his companions, Jamie and Zoe, arrive after rescuing a peculiar blue box, they are quickly embroiled in a dangerous mystery that threatens the colony's existence. As suspicion mounts against them, they must unravel secrets that date back to the solar system's origins to save themselves and the Wheel.