Celebrating T'Pol's first full year with the Enterprise crew over dinner, Archer asks why her record states that she once took a five-day leave to visit an old Pennsylvania mining town called Carbon Creek. She claims Carbon Creek was the site of actual first contact between humans and Vulcans, long before the historical First Contact in 2063, and her second foremother (great-grandmother) was there. Trip Tucker scoffs at this, but then T'Pol offers to tell "the story."