Zelda Gamson tried for decades to stop smoking. But while one part of her wanted to quit, another part just didn't want to let go. So, how do you win a tug-of-war with yourself? We decided to ask one of the greatest negotiators of our time for some advice. Adam Davidson from Planet Money introduces us to Nobel Prize-winning economist Thomas Schelling, whose tactical skills saw him through high-stakes conflicts during the Cold War. But while his strategies worked wonders during nuclear stand-offs, it turns out they fell apart when he tried them on himself...in his own battle to quit smoking. Then one day, he had an idea so diabolical we thought no one would try it. Until we met Zelda, and her friend Mary Belenky, who came up with a contract powerful enough to give Zelda a fighting chance. Neuroscientist David Eagleman helps us untangle the tricky business of cutting deals with oursleves. And producer Pat Walters complicates things--in a good way--with the story of two brothers, Dennis and Kai Woo, who forged a deal with each other that wound up determining both of their futures.