Far in the future, on a tough, brutal planet, a devastated mining colony has only one survivor. To discover the truth, the Doctor and Belinda must face absolute terror.
The Doctor and Belinda arrive at a mining colony 500,000 years in the future. The miners are all but dead but one survivor, and the two travelers join a squad of Marines sent to investigate.... and find a creature that the Doctor encountered 400,000 years ago.—Gislef