S5E10: The One with the Inappropriate Sister

Joey teaches Ross how to be unemployed. Phoebe is working for the Salvation Army during the holidays. Monica is tired of Rachel's obsessing about Danny and asks him to go out with her. Ross convinces Joey to write a play about himself. Phoebe is distressed after finding out that New Yorkers are mean. Rachel meets Danny's sister and is dismayed when the two seem a little too playful. Phoebe vows a return to "Street Phoebe."