We are bringing in another threat, which is nature itself. I don't really want to get into specifics too much, but I will say that there is a third uncontrollable, almost undefeatable threat that is going to come in when the characters of the show are at their most vulnerable. It's really going to be something that they have a hard time dealing with.
Medicine really matured me as a person because, as a physician, you're obviously dealing with life and death issues, issues much more serious than what we're talking about in entertainment. You can't get more serious than life and death. And if you can handle that, you can handle anything.