Once we met Traci and talked with her about the role, I was impressed with her professionalism and from her audition. I just didn't see it as being much of a problem. She's proven to be fairly popular. I think she's a good addition to the show. We ramped up the alien menace in the form of Mabus, the alien Antichrist, who had appeared to lead the second wave.
Every episode now has a little bit more sense of urgency.
You'll see this as the season develops. It was an attempt to finally see the face of this evil. To create someone who could be a specific villain. It's very common in science fiction that you would do something like this. We just felt it was necessary.