Ben Mulroney is flying overseas this weekend, so Alex Pierson will be taking his place at 9 AM. Filling in for her is super-sub Brad Smith, who seems to be their only regular guest host. Not sure if that's just for Monday or the whole week, because most people who head overseas don't come back over a weekend. 

This is just the start of the holiday silly season, when schedules are thrown into disarray by people who have vacation left, start taking that time off. Greg Brady was lamenting on Friday that he'd run out of his days, so he'll be there until Christmas.