S6E17: The One Where Ross Dates a Student

At the end of semester Ross gets his student evaluations and one of them writes that he's hot. It turns out to be a cute girl named Elizabeth and even though it could cost him his job, Ross considers dating her. An ex-girlfriend of Chandler's from college is directing the new Al Pacino movie and Joey asks Chandler for help with getting an audition. Meanwhile, after a fire ruins Phoebe and Rachel's apartment, they're forced to find temporary living spaces with Monica and Joey.