Well, I'm just going to go ahead and come right out and say it: a couple of years ago, I wrote a spec script for the show, and producer/director Greg Bailey helped guide me through the right people to contact at WGBH to get my spec submitted; after reading and signing a release form, I submitted my spec to WGBH and was told that it would be forwarded to their head writer at their next summer story meeting and that I would be informed if anything would become of the script. Like I said, that was two or three years ago, and no further word, and now that Season 20 is finished and titles, descriptions, and airdates for Season 21 have been released, I don't believe anything is going to become of it. It was an interesting experience though, and even Greg Bailey was surprised I got as far as I did in the process.
There's hope for Season 22 now, not because we need it, but because it appears that Season 21 will end with another one of those godawful talking Pal and Kate episodes, and if ARTHUR isn't renewed after this, then what a very poor way to end a series.