Once upon a time, a man had an idea for a documentary on free-market ideas. Then that man was introduced to Milton Friedman. The result of their collaboration was a wildly successful book and PBS series, Free to Choose, capturing Friedman's view of the world, how markets work, and the role of individual liberty in free-market economies. The man behind that documentary, Robert Chitester, talks with EconTalk host Russ Roberts about how that documentary came about and Chitester's long-time friendship and work with Milton and Rose Friedman.