Madeline convinces the young Prince of Monaco to remove his crown so he can spend an afternoon as an ordinary boy.

The girls take up an invitation to enter a spelling bee competition in Istanbul.

A paleontologist comes to the Old House. Genevieve digs up an ancient relic while burying a bone.

Pepito becomes frustrated when an old lamp from the Embassy attic fails to produce a Genie, and he throws the lamp in the trash; that night, a frayed old magic carpet comes to Madeline's window.

The newspaper sponsors a treasure hunt leading to a chest full of money and the clues lead the group to famous French landmarks.

Madeline, the girls, Pepito, and his three naughty cousins go on a field trip to Egypt; Nicole becomes terrified when they experience a series of mishaps.

To raise money to buy Miss Clavel a birthday present, Madeline starts a detective school; Miss Clavel is receiving mysterious gifts of great value.

After Miss Clavel inspires the girls to read more books, they decide to put on a presentation of The Hunchback of Notre Dame; Pepito refuses to play the title role because he is embarrassed to portray an ugly, deformed character.

Lord Cucuface arrives at the Old House with a large chunk of prize-winning cheese for fondue and a new touring car; while Cucuface takes Miss Clavel for a calamitous driving lesson, the mice eat the cheese.

For their entry in the Science Exhibition, Madeline and the girls create a magnificent scale model of a hot air balloon; during the exhibition, Genevieve falls asleep in the balloon's basket and the balloon inadvertently takes off.

The American child star Sugar Dimples becomes homesick when visiting Paris, and especially misses Halloween, which is not celebrated in France.

When the girls go for pony rides in the park, Madeline's pony, Gallop, does all sorts of fancy tricks and finally takes off, trotting across Paris.

In the middle of the winter holiday season, Miss Clavel gets called away from the Old House to care for her ailing aunt; Lord Cucuface replaces her with Mr. Grump, who is more of a drill sergeant than headmaster.