When Rosie sees George and Jane at a robot shop and looking at the lastest advance in robot maids, she believes they're going to replace her (when they were really looking for the part). She runs away looking for jobs & a room to stay.
Their new robot maid is a real dictator that drives them crazy.
While Judy's taking her driving test, she spots Rosie! She takes her back home and finds the new maid! So she heads to the scrap pile about to permanently junk herself just before the family rescues her. George explains everything, Henry fixes up Rosie with a new program and Rosie throws the new robot maid out of the Jetson home much to her and the family's delight!