ALL: Attack! But we must convince the others he's not the Evil One. DOCTOR: And move. DOCTOR: Come in. DOCTOR: More to the point, who could that be? In Switzerland. Perhaps Leela's right about you. We live in an imperfect universe.
Plan: A: protestations; Q: What did the Doctor do against being the Evil One? A: mounting evidence; Q: What points to the Doctor's prior involvement with Leela's people? A: their distant past; Q: Where did the Doctor make an error in judgment that puts them all in danger? A: immediate jeopardy; Q: What does the Doctor's past involvement with Leela's people put them all in? Summary: Despite protestations against being the Evil One, mounting evidence points to the Doctor's prior involvement with Leela's people, and an error in judgment he once made in their distant past that puts them all in immediate jeopardy.