I'm the 2900th voter and I'm honestly surprised this is only rated as 6.3. It was a very good show for the first 2 years. Still OK after that. I'd say 7-8 would be fair. But it gets less funny and a bit stale near the end, probably because it was so famously plagued with behind the scenes drama related to Brett Butler's drug addiction and erratic and diva-like behaviour.
Review of Grace Under Fire
