What are good instructional cooking TV shows? In the spirit of Aaronut's comment on my answer to TV Programs like Good Eats, what are good shows for people to really learn about cooking (the science behind cooking; the history and cultural significance between dishes), rather than just watching a chef prepare their favorite recipes?

(web videos and animations count, too)

This is community wiki, so please edit the main answer instead of posting a new one.  Please also make sure to include a description of the show and, if possible, a link.
Good Eats (Food Network): Explains some of the science behind why techniques work, and occassional information about the history of the ingredients or dishes.
America's Test Kitchen (PBS) and Cook's Country (PBS): Explain the techniques that they've used to improve dishes, and have occassional segments explain the science behind cooking processes.
Mexico - One Plate at a Time (PBS): Describes the differences in the regional differences of mexican cooking, and often compares historical versions of dishes to the modern versions.
Deep Fried, Live! (web animation): Flash animation cooking show that allows you to click at various points to get more information about ingredients &amp; techniques.
In Search of Perfection (BBC 2): Heston Blumenthal brings his molecular gastronomy techniques to some of Britains favourite dishes such as roast chicken, fish and chips, spaghetti Bolognese etc. The show was followed up by a second series, "Further Adventures In Search of Perfection".  At the time of writing, episodes from both series can be found on YouTube.