I personally didn't find this as good as the other episodes. It's mostly because there wasn't that much going on. The story didn't progress too much. How are they going to dig out of Hell? It's underground! Do they dig up?
That must be it. The voices were quite funny. Dang, Harry's had better days. I wish Beebo had more of a role. I like the title pun. You know, cat out of hell.