In this two-part third episode, we learn about “ground truthing” in the city of brotherly and sisterly love, Philadelphia. In Part 1, we talk to scholar Candis Callison, artist Roderick Coover, and Sustainability Director Christine Knapp about the problem of uncertain futures, and the ways in which scientific data and digital assets need personal experiences and stories, or ground truths. Then we meet the residents of Eastwick, a neighborhood in southwest Philadelphia. Eastwick neighbors Leonard Stewart, Margie and Nancy Cobb, and Earl Wilson teach us about the ways that they brought model truths and ground truths together to make environmental changes in their neighborhood.