This episode is titled "Local Color and the Evolution of Form"
A lot of painters have heard the term "local color" but don't really know what it is! Watch this episode and learn. Your understanding of this concept is crucial to comprehending later on how the illusion of light is created with paint. Local color is fixed and constant, if you were to mix a pile of paint that was the "local color" of something, you would have mixed the color of the thing itself