Judy is excited about becoming a doctor, especially when Class 3T starts a new unit on the human body, but she learns more about being a patient when she catches tonsillitis from her little brother, Stink.

The Barker children visit the pediatrician before school starts.

Felix feels bad and does not want to eat or play, so his mother takes him to Doctor Duck, who makes everything better.

After bumping his knee one morning, Ted decides to become a doctor, but he has only one problem--he has no patients!

Jenny Jay has a cough, Joey Jay needs his immunization shot, and Jack Jay has a sprained wrist, so the whole Jay family goes to the doctor to find out how to get well.