CAPTAIN: Guards. DOCTOR: I'm going to see to the Captain. KIMUS: And that's when the lights change. ROMANA: Yes. Stop them! The planet Terra.
Plan: A: The Doctor; Q: Who takes Romana down to investigate the mines? A: the planets mines; Q: Where does the Doctor take Romana? A: unexpected help; Q: What does the Doctor get when the Captains guards show up? A: the Captains guards; Q: Who shows up to confront the Doctor and Romana? Summary: The Doctor takes Romana down to investigate the planets mines and gets unexpected help when the Captains guards show up to confront them.