But they do have special dead fandom rules, so maybe it qualifies under that?

Maybe. I thought that had to be ten years dead, but I'm probably wrong. Makes more sense than anything else, though it still doesn't explain why Numb3rs isn't eligible, unless there's a huge well of fic somewhere that I'm just missing!

I don't even know why I'm looking at the nomination form. This way lies madness...

I'm pretty sure I'm the evidence to support that theory :) But there are two shows I want to ask for that I don't think anyone else will nominate (which probably renders asking for them totally pointless!), so there I go.