(The man from the hospital enters the room, staring at the back of HIBBERT'S neck. UNIT HEADQUARTERS. CHANNING: Good. (To the BRIGADIER.) LIZ: What are you a doctor of, by the way? The DOCTOR turns to her.) AUTO PLASTICS.
Plan: A: Autons; Q: What is the name of the mysterious plastic creatures that impede UNIT's attempts to locate the meteorites? A: Channing; Q: Who is building the Autons? A: a nearby factory; Q: Where are the Autons being constructed? A: the Doctor; Q: Who makes another attempt to escape from the hospital? Summary: UNIT's attempts to locate the meteorites are hampered by the mysterious plastic Autons, being constructed by Channing at a nearby factory, while the Doctor makes another attempt to escape from the hospital.