The One with the Evil Orthodontist

Plot:

The friends are angry to discover someone watches them by telescope, until they phone her and she compliments them. Chandler is ecstatic after a date with Danielle, but Joey and Ross agree he should not call her that day to avoid seeming desperate. However, the girls persuade him to call. When Ross finally gets Rachel to tell her ex Barry that it is inappropriate for him to declare his love for her as he's about to marry her friend Minday. However Barry and Rachel end up having sex in his dentists chair. Mindy meets her friend Rachel as bridesmaid while confiding she suspects Barry to have an affair.