watch 01:20 The Loop (TV) Do you like this video? The Primitive Earth was an alternate universe visited by the Third Doctor and Sarah Jane Smith in the 1970s. In this universe, Earth was much less advanced than its counterpart in N-Space. (COMIC: Who's Who?) Retrieved from "https://tardis.fandom.com/wiki/Primitive_Earth?oldid=2228291" Categories: Alternate timelines Alternate Earth + cat Cancel Save Community content is available under CC-BY-SA unless otherwise noted.