Prehistory

Prehistory referred to the time during the development of human culture on Earth before the appearance of the written word. It was divided into three periods based on the technology used by humans at the time: the Stone, Bronze, and Iron ages. (PROSE: A History of Humankind)

While attempting to participate in the Dalek invasion of Earth in the year 2415, the Golden Emperor's time machine took him to Earth's prehistoric period, where he was attacked with rocks thrown by primitive humans. (COMIC: The Secret of the Emperor)