Returning to the flaming ruins, the Doctor and Davis followed the tracks to the Daleks' underground base, where they had been capturing ships and their crew for three hundred years. The Doctor and Davis took an old biplane and flew it to a weather ship, where they were unable to warn of the Dalek threat in time. After the Daleks attacked Sydney, Davis worked with the Doctor to defeat their plans. When the Doctor lured the Daleks underneath Sydney Harbour Bridge, Davis dropped a live wire onto the sub, electrocuting and killing the Daleks. (COMIC: *Sub Zero)