Friends Season 4 Episode 6 : The One With The Dirty Girl
Ross's new girlfriend (Rebecca Romijn-Stamos) seems nearly perfect until he discovers that her apartment is incredibly dirty. Chandler buys Kathy a first edition of her favorite children's book for her birthday. He tries to help Joey (then dating Kathy) buy a present that is comparable to his own, but Joey only ends up purchasing something very meaningless and inexpensive. Phoebe and Monica decide to become partners in a catering business.