Alan Alda visits Yale University’s Laurie Santos at a small Caribbean island where she is studying rhesus monkeys’ ability to steal grapes…and read minds.

Alan Alda finds out how children will help—and like it, while chimps are less inclined to offer enthusiastic assistance.

Alan Alda sets out to explore the difference between chimpanzees and ourselves, and quickly finds that the scientists studying chimps and other non-human primates are themselves separated into opposing worldviews.