Your Home Sweet Home is My Home Sweet Home - S4-E25
Continuity mistake: The Petrie house (where Rob and Laura, Jerry and Millie are standing together bickering) is completely different from the episode "Where Did I Come From?" and a few others.
Continuity mistake: When Top Cat and his friends are congratulating the new member of the gang ("the baby"), Top Cat is seen holding his hat in his hand, but during the congratulations his hat mysteriously appears on his head despite still holding his hat in his hand.