A Pyrovile steps in front of them, but the Doctor kills it with the water pistol, then they run toward the escape pod. But one day, Pompeii will be found, again. But... that's the choice, Donna. CAECILIUS: And here it is! CAECILIUS: The soothsayers. DONNA: What, and that turns into... He leads the Doctor to Lucius' house. If I could go back and save them then I would, but I can't. LUCIUS: An energy converter of what? Lobus Caecilius. Maybe... it erupts, and they launch themselves back into space or something? Mother and father and son. Quintus throws the torch at the guards, the Doctor uses the sonic screwdriver to push the circuits off the shelf, then he and Quintus jump out through the window. THE DOCTOR: Caecilius, all of you! THE DOCTOR: It's the heart of Vesuvius. THE DOCTOR: That thing in the villa, that was an adult Pyrovile. The Doctor and Donna arrive to a gigantic cave. The Doctor and Donna enter the TARDIS quietly. The Doctor and Quintus arrive. The Doctor, Donna and Caecilius' family are standing on a hillside, watching the destruction of Pompeii. The TARDIS, having just been moved into the villa is surrounded by Caecilius and his servants, who are scurrying away. The people of Pompeii are turning to stone before the volcano erupts. This Lucius Petrus Dextrus... Vesuvius erupts.
Plan: A: The Doctor; Q: Who saves Caecilius and his family? A: Donna; Q: Who begs the Doctor to go back and save Caecilius and his family? A: Pompeii; Q: Where did the Doctor and Donna arrive one day before the eruption of Mount Vesuvius? A: Mount Vesuvius; Q: What volcano erupted in 79? A: the TARDIS; Q: What do the Doctor and Donna search for after they trigger the eruption of Mount Vesuvius? A: sculptor Lobus Caecilius; Q: Who was the TARDIS sold to? A: Lucius Petrus Dextrus; Q: Who is the local augur that the Doctor and Donna meet? A: an oversized circuit board Caecilius; Q: What does Lucius Petrus Dextrus want to collect? A: Caecilius's son; Q: Who is Quintus? A: numerous circuit boards; Q: What does the Doctor find in Lucius Petrus Dextrus' house? A: multiple sculptors; Q: Who made the circuit boards in Lucius' house? A: an energy converter; Q: What do the circuits form? A: Sibylline Sisterhood; Q: Whose soothsayers are being slowly turned into stone creatures called Pyroviles? A: the heart; Q: Where does the Doctor escape into Mount Vesuvius? A: Pompeii's inhabitants; Q: Who does the Doctor decide to kill by erupting Mount Vesuvius? A: the converter; Q: What does the Doctor think the Pyroviles will use to turn all of humanity into Pyroviles? Summary: The Doctor and Donna arrive in Pompeii one day before the eruption of Mount Vesuvius in 79 . They discover that the TARDIS was sold to sculptor Lobus Caecilius, and they search for it. At Caecilius's house, the Doctor and Donna meet the local augur , Lucius Petrus Dextrus, who has arrived to collect what resembles an oversized circuit board Caecilius has sculpted. The Doctor breaks into Lucius' house with Caecilius's son Quintus, and finds numerous circuit boards made by multiple sculptors without the others knowing. The Doctor deduces that the circuits will form an energy converter. The Doctor discovers that the Sibylline Sisterhood soothsayers are being slowly turned into stone creatures called Pyroviles . He escapes with Donna into the heart of Mount Vesuvius, and is faced with the choice of either erupting the volcano and killing Pompeii's inhabitants, or letting the Pyroviles use the converter to turn all of humanity into Pyroviles. The Doctor and Donna trigger the eruption and run for the TARDIS, leaving Caecilius and his family, but Donna begs the Doctor to go back and save them. The Doctor relents and saves Caecilius and his family, leaving them on a hill overlooking Pompeii.