Why is there a section in the regular cast section of a tv page for season 0 (the special season)? Shouldnt that not exist? Is there such thing as season regular cast for specials (I feel like that goes against what special episodes are). Am I wrong?

I guess its possible there are specials with starring cast credits- but I wouldnt know, I have never paid attention to the cast credits of specials I dont think. And still, I feel like regardless specials season should still not have them/all cast regardless how they are credited on screen for specials should just be added as guest stars for the specials they appear in?

edit: maybe I just didnt find it but I dont see anything in the rules about this