Visible crew/equipment: In the wigwam scene, crew members and the white screen reflector are visible in Bree's sunglasses.
Factual error: Bree is on hormones up until the day of her surgery. In reality, estrogen can't be taken for several weeks beforehand because it increases the risk of blood clots.
Continuity mistake: Just before Bree and Toby have their car stolen, it has Maine license plates. In every other scene it is shown with New York plates.
