Back at UNIT HQ, Sergeant Osgood manages to repair the time bridge, although it must be run at a reduced rate of power in order to prevent the accumulators from burning out again. Yates volunteers to go through the bridge and search for the Doctor and Liz, and while searching the island, he finds Amelia and rescues her from a giant spider. Since Amelia is unable to climb out of the pit, she and Mike must search for another way out, and while doing so they stumble across a giant statue, presumably the islanders’ deity—a giant humanoid carved from remarkably pliant stone, with a single ruby-red eye. The pit turns out to be an extinct lava tube, which comes to the surface elsewhere in the jungle. While returning to the Constitution, however, Mike and Amelia are attacked by a miniature tank which has been taking samples of the flora and fauna from the island. Trying to fight it off, Mike accidentally destroys it when his grenade ruptures what proves to be a high-pressure water tank. He and Amelia are then reunited with the expedition members and with the Doctor and Liz, but as they share stories, a shower of paper leaflets floats across the island, having been flung through the time bridge by a desperate Lethbridge-Stewart. UNIT's research team has just learned that Salutua will be completely destroyed by a volcanic eruption this very night.