The Doctor, Amy Pond and Rory Williams answer a distress call from Elpha, whom, with her cubs, he had earlier saved and returned home. Taken to the tribe's Queen, she explains that the mechanical men are destroying the forest's Hoojib trees and their fruit, which the tribe need to survive. The Doctor discovers the mechanical men are Dronebots, which he had met on Figaro Xll). Taking advantage of his experience as a Roman Centurion, Rory is sent to organise an attack on the Dronebots base, a spaceship on the planet's surface. The Doctor and Amy sneak around the back.