Anyone who wanders around the Colony at night...may be killed. In the patch of light is a hideous crab-like creature with giant claws similar to that seen on the TARDIS scanner and luminous eyes on stalks...) MEDOK'S CELL
(MEDOK is alarmed at the sight of the DOCTOR.)
Plan: A: a holiday camp company; Q: Where does the TARDIS arrive? A: the crew; Q: Who is worried about giant crabs? A: the Doctor; Q: Who is interested in the stories of creatures that roam the colony at night? A: Medok; Q: Who is the madman who tells the Doctor about creatures that roam the colony at night? Summary: The TARDIS arrives at a holiday camp company with the crew worried by a prediction of giant crabs and the Doctor becomes interested in the apparent madman Medok's stories of creatures that roam the colony at night.