 Six and Starbuck realize Three, having previously seen the final five, will be able to recognize the final five from among the presumed humans in the fleet, and as the five are "from the home of the thirteenth" they are from Earth, the home of the thirteenth tribe of humans.Thus they believe resurrecting Three will allow the five to be found and give the fleet a way home to Earth.It turns out much later, in the episode "Sometimes a Great Notion", that "who have come from the home of the thirteenth" is to be taken literally on a different level.