2x17 "The One Where Eddie Moves In"

Phoebe is discovered by a record producer who wants to make her song "Smelly Cat" a video, but who secretly dubs in the voice of a more talented (but less attractive) woman. Ross's new relationship with Rachel makes Monica feel like she's living with her brother again... and she hates it. Joey is finding living alone is not really for him, and wants to move back in with Chandler. However Chandler, having been led to believe Joey wouldn't want to come back, already has a new roommate Eddie. However Chandler finds that he doesn't really click with Eddie (who won't play foosball and doesn't like Baywatch) as well as he did with Joey, and quickly begins to miss Joey too.