We’ll take a look behind the scenes at the major players in the fight over how to stop global warming. Then, the director of the film "Iran: Voices of the Unheard" talks about Iranian secularists fighting political repression. And Aimee Bender discusses her novel The Particular Sadness of Lemon Cake, about a pastry that contains a woman’s emotions. We'll find out why big cats respond to strong men's cologne. Plus, tennis star, coach and commentator Patrick McEnroe tells stories from his life on and off the court.