Titre original : A Fellow Traveler
Dr. Leonard gives Candy permission to take five days of holidays, but first requires her to travel to Florida and deliver important documents to Dr. Kreis. Before boarding the train, a woman asks Candy to keep a watchful eye over her boy named Gilbert. Later, Candy learns Gilbert holds a deep grudge against all medical personnel ever since Dr. Leonard treated his father sick with cancer and Gilbert's father died. When Candy dozes off, Gilbert steals the documents to avenge himself against Dr. Leonard. When he claims he threw the papers out of the train, Candy wants to jump off. But a passing conductor wants medical help for a sick child named Carrie. Candy fears the child may have appendicitis, but there is no doctor on board. And the doctor of the village at their next stop is out of town and not expected to return before nightfall. Luckily, there is a doctor aboard the train going to Chicago. He operates and saves Carrie's life with Candy assisting him. The doctor turns out to be an old rival of Dr. Leonard. Feeling guilty for his earlier misconduct, Gilbert gives Candy back the papers he stole and hid, but did not really throw away.