I grew up loving NOVA and also would wake up early before anyone else in the house and watch an art show where you drew with the artist, mostly wildlife. I wish I could remember the name of that program.
Now I watch mainly cooking shows. I adore "Kitchen Vignettes", a farm to table shorts program that's filmed not too far from me, and "Trails to Oishii Tokyo" which gives me a wonderful window into the growing and use of many Japanese perennial vegetables that I grow but otherwise don't really know enough about to fully enjoy. This past weekend they had a show on Fuki which caused me to run outside, break through a snow crust and harvest Fukinoto, the just emerging unopened flower buds of fuki. I got to enjoy them for the first time as I had always waited a bit too long when their flavor is overpowering. In this episode a Japanese farmer points out one at the stage I used to harvest them and says "too late!"

Thank you, thank you, thank you!!!
Kitchen Vignettes site
Trails to Oishii Tokyo - Fukinoto episode
Kitchen Vignettes is where I learned to lactoferment sunchokes!