When they do bring on new people, it`s good for the show. It`s like getting a new toy. The writers enjoy it because it`s a whole new character that they can write for, one that they aren`t used to writing for. They can try different things.
The biggest challenge has been simulating a tornado with wind machines and dirt and debris. Right when you walk on the set, you feel the energy of a tornado. But the hardest thing is trying to get dialogue out in all of that.