Right, so your main intention is to seperate fiction and non-fiction?

So TV Special isn't specific enough? Well, the only thing I can think of is having the categories "TV Special: Fiction" and "TV Special: Non-fiction".

Personally I think it would be simpler not to worry about this and just group Top Gear, reality TV etc. under TV Series. If you're not sure whether something is fictional or not, just go to IMDB or ask the contributor.