Who could argue that television isn’t a great medium for learning about art? In its pared-down, visually literate way it delivers what dull, theory-laden extrapolations often can’t (if only because artists don’t think that way when they make things, and we don’t think that way when we look at things). It can breathe renewed life and vigour into a subject we think we know well, and, as a medium for simplified, pocket-sized information, it can get straight to the heart of a matter. Perfect. Possibly. And so we come to The Impressionists: Painting and Revolution.