(IAN reaches up to the door where there is an identical metal bar to the one in the box. BARBARA: The river? DOCTOR: (Quietly.) DOCTOR: (To CRADDOCK.) IAN: Why did the Daleks put it there in the first place? It's finished. Take them! What were the doctor's and the scientists doing about it? With this!
Plan: A: TARDIS; Q: What is the name of the Doctor's time machine? A: the 22nd century; Q: What century is it when the TARDIS returns to London? A: bodies; Q: What is in the river? A: the docklands; Q: Where is the quiet? A: The Daleks; Q: Who has invaded London? Summary: The TARDIS returns to London; however, it's the 22nd century. With bodies in the river, and quiet in the docklands, the city is a very different place. The Daleks have invaded and it's up to the Doctor to thwart them once again.