Milton Friedman on the Phil Donahue show from 1979.
Fantastic discussion of basic economics and why free markets work. I especially like the way Friedman punctures everyone of Donahue's anti-capitalist assumptions.
One thing that strikes me is how much time Friedman is given to talk. I don't watch much TV - at least not many talk shows - but my perception is that a guest today never gets so much time to speak and develop ideas without being talked over or interrupted by the host(s).