Doctor Who: Wheel of Ice

The Wheel. A ring of ice and steel turning around a moon of Saturn, and home to a mining colony supplying a resource-hungry Earth. It's a bad place to grow up. The colony has been plagued by problems. Maybe it's just gremlins, just bad luck. But the equipment failures and thefts of resources have been increasing, and there have been stories among the children of mysterious creatures glimpsed aboard the Wheel. Many of the younger workers refuse to go down the warren-like mines anymore.