I love Downton Abbey, but I don't think I could knit while watching it. It's one of those shows that take my entire concentration, esp when the Lady Countess starts in with her quips
Now Doctor Who, which I also love, is great for a KAL. I got some old Tom Baker era DVDs for Christmas and have been happily knitting my season 18 Doctor Who scarf while watching them
Good luck tho. Once you find your wool, have you decided what you will knit?