Season 5: Episode 113: The One With The Cop
When Phoebe finds a policeman's badge at the coffee shop, she uses its power to enforce some laws of her own. Eventually the badge's owner (played by Michael Rappaport) comes to retrieve it, catching Phoebe in the act of "policework'. The two hit it off and start dating. Meanwhile, Ross buys a new couch but refuses to pay the delivery charge, insisting he and Rachel can carry it the three blocks to his new apartment themselves. Unfortunately, they can't manage to get it up the stairs in his building, and Ross ends up returning the now sawed-in-half couch to the store. Joey has a romantic dream about Monica and is consumed by guilt, believing that he has fallen in love with her.