What happens when technology conquers nature and removes the need for sleep? An abomination and a threat to all mankind, that’s what.
The Doctor and Clara encounter a rescue team on the deserted Le Verrier laboratory orbiting Neptune, where they discover the station’s sole survivor, Professor Rassmussen. His Morpheus sleep pods (Morpheus being the Greek god of dreams) have resulted in the creation of the Sandmen, who have fed on the crew and need further sustenance.
After a series of narrow escapes results in the loss of most of the rescue team, the Doctor manages to save their leader Nagata and escape. However, the dead Rassmussen reveals that his plan all along was to spread the Morpheus process via electronic… Read the full story