(JO smiles.) (To the colonist.) Go on! In! MASTER: I want to use your services as a guide, Doctor. PRIMITIVE CITY ENTRANCE
(The DOCTOR and the MASTER approach the concealed rock door.) Take cover!
Plan: A: the colonists; Q: Who does the Master offer to help? A: the Primitive city; Q: What does the Master want information on? A: the Doctor; Q: Who does the Master force to act as a guide? A: Jo hostage; Q: Who does the Master take hostage? Summary: The Master offers to help the colonists in exchange for information on the Primitive city and forces the Doctor to act as a guide by taking Jo hostage.