Producer Sarah Koenig continues the story Terry Engelder and Dan Volz, their rival calculations about natural gas in Pennsylvania, and how each was treated by his university. She explains how Pennsylvania's universities, politicans and industry have united to develop natural gas.

Working in a poultry processing plant is one of the most unpleasant jobs you can get in this country. It's low-paid, dangerous and difficult.

Chaya Lipschutz, an Orthodox Jewish woman from Brooklyn, donated her kidney to a stranger. After that, she decided to spend all her time trying to match up potential donors with kidney patients.

The story of a band of libertarians with a plan to take over a state. They call it the Free State Project and it goes like this: They pick a state with a low population, 20,000 of them move to it, establish a voting majority, and run it according to libertarian principles.