(To the DOCTOR and JAMIE.) They're still in the lift shaft. VAUGHN: Of course. WATKINS: Really? What about Zoe and Isobel?
Plan: A: The Doctor; Q: Who is with Jamie when they return to the IE factory? A: the IE factory; Q: Where do the Doctor and Jamie go to find Zoe and Isobel? A: Professor Watkins; Q: Who did the Doctor and Jamie meet at the IE factory? Summary: The Doctor and Jamie return to the IE factory in search of Zoe and Isobel, where they meet with Professor Watkins and fall foul of Vaughn.