5x04 "The One Where Phoebe Hates PBS"

Joey gets a job at a PBS telethon which prompts Phoebe to reveal that she hates PBS. He tells her that there is no such thing as a selfless good deed and she tries to find one to prove him wrong. Emily finally contacts Ross and they decide to give their relationship another try and she agrees to come to New York – if Ross promises to stop being friends with Rachel. Ross doesn't immediately answer, but when Rachel (not knowing Emily's demand) tells him that he needs to do whatever he needs to in order to get his wife back Ross agrees. When Rachel reveals that Monica said her new "secret boyfriend" (who is Chandler) was the "best sex she ever had", Chandler begins to gloat, much to Monica's dismay.