During Marcia's daydream about being married to Dr Vogel, when Dr Vogel is in the chair in the Brady living room, the headrest continually changes from up to down, varying with the camera angle.
After Marcia breaks her 'date' with Dr. Vogel, she tells him she will still be in for her teeth cleaning on Wednesday. She shouldn't have to go in for a teeth cleaning so soon. She would have just had them cleaned during the visit when she found out she needed to have a cavity filled.