Amyand, I want you to go back to Turlough and give him this. DOCTOR: Ah, you're experimenting with the Tissue Compression Eliminator. DOCTOR: Trying to slow down the eruption. DOCTOR: Why? I, for my sins, was sent by the regime to Earth. Now for the Master. PERI: He's a robot.
Plan: A: his tissue compression eliminator; Q: What does the Master need to bring himself back to full size? A: The Master; Q: Who tries to destroy the Doctor? A: Turlough; Q: Who tells the Doctor why he was exiled to Earth? A: a decision; Q: What does Turlough make? Summary: In order to complete his plan to bring himself back to full size after his accident with his tissue compression eliminator, The Master tries to destroy the Doctor. Turlough makes a decision and tells the Doctor why he was exiled to Earth.