When you go to a tiny, isolated island in the middle of the South Atlantic and get invited to dinner by the island's top two economists, you say yes. Extremities is made possible by Curiosity Stream. Sign up for a  Curiosity Stream subscription at http://CuriosityStream.com/ext and get a free subscription to Nebula--the streaming video site that Wendover Productions helped found. On Nebula, find The World's Most Useful Airport--the documentary we produced about St Helena's airport.