5x06 "The One with the Yeti"

Phoebe receives a fur coat from her mother. At first she wants to get it cremated, but then starts to get attached to it. Monica and Rachel look for a waffle maker in the basement, the light falters and they see a very hairy guy, whom they mistake for a yeti. He then turns out to be their new neighbor, Danny. Emily's demands start to get more and more unreasonable as Ross is forced to move out of the apartment and sell his furniture as Emily doesn't want him living anywhere near Rachel or own anything that's been touched by her. As he enjoys dinner with the gang, Emily calls Ross and her reaction upon learning Rachel is there makes him realize she doesn't trust him. In the end, the two agree that their marriage is over.