S4 E1 • Le permis de conduire

Première diffusion : 23 septembre 1997

S4 E2 • De si délicieux beignets

Première diffusion : 25 septembre 1997

S4 E3 • Un grand bol d’air

Première diffusion : 30 septembre 1997

S4 E4 • Chère tante Ashley

Aunt Ashley is everything Barbara isn't: fancy, outrageous, irresponsible, crazy. Alex's wild go-cart ride with her aunt forces Barbara to get tough with both of them. Alex's school work suffers while her spirits soar.

Première diffusion : 2 octobre 1997

S4 E5 • Les incroyables pouvoirs d'Oscar

Alex tries to rescue a chimp named Oscar from Vince by secretly keeping him as a pet. Annie is forced to tell George the truth about GC-161.

Première diffusion : 7 octobre 1997

S4 E6 • Faute de pied

While Louis is innocently taking a photo, he catches Alex's zapper-gone-wild on film. He's sure he's captured some kind of UFO that will make his footage famous. Meanwhile, Alex helps George overcome his fear of bowling.

Première diffusion : 9 octobre 1997

S4 E7 • Qui est qui ?

A morphing accident causes Alex to switch bodies with Barbara. Alex realizes that she's not ready for adulthood. Annie loses confidence about leaving home and talks to George about it.

Première diffusion : 14 octobre 1997

S4 E8 • Par une soirée d’orage

Première diffusion : 16 octobre 1997

S4 E9 • Tout ira bien

Alex saves a woman's life but can't tell the authorities that she double-morphed the woman to the hospital. The mystery heightens Danielle Atron's suspicions. As Annie prepares for college, a bittersweet realization comes over the sisters who share so much.

Première diffusion : 21 octobre 1997

S4 E10 • Señora Garcia

Alex struggles in Spanish class with a tough teacher, then struggles with the possibility that she got the teacher fired. Lars sets Dave up to be the first human research specimen for dangerous GC-161.

Première diffusion : 23 octobre 1997

S4 E11 • Le stratagème

Alex has a doctor's appointment and fears her altered body chemistry will be discovered. Robyn grieves over the loss of her hamster.

Première diffusion : 28 octobre 1997

S4 E12 • Rêve de gloire

Ray, Louis and Alex form a band and have to deal with issues of leadership, fame and competition. Robyn learns the ""rules"" of dating from Kelly.

Première diffusion : 4 novembre 1997

S4 E13 • Les choses changent

Ray is purposely mysterious about his new girlfriend, Rachel, so that Alex won't get jealous. Alex becomes jealous anyway and struggles with accepting a new friend.

Première diffusion : 6 novembre 1997

S4 E14 • Règlements de compte

Alex becomes friends with the new boy in school, Hunter, who may know something about the GC-161 project.

Première diffusion : 18 novembre 1997

S4 E15 • Le feu de l’amitié

Robyn moves in with Alex while her parents are away while Mr. Mack suspects that Dave may be his secret GC-161 informant.

Première diffusion : 20 novembre 1997

S4 E16 • Un secret trop longtemps gardé

When Hunter finds out about the GC-161 accident he starts searching for the GC-161 kid in order to expose the plant and uncover the truth about his father's disappearance.

Première diffusion : 25 novembre 1997

S4 E17 • Un mélange spécial

Alex plays matchmaker and sets Louis up with Hannah Mercury. Meanwhile, Ray gets a fancy new job and Alex falls in love with Hunter!

Première diffusion : 2 décembre 1997

S4 E18 • Une journée d’enfer

Première diffusion : 4 décembre 1997

S4 E19 • L’antidote [1/2]

After four years of keeping her powers hidden, Alex's secret world is falling apart. As the Plant prepares for the release of GC-161 to the public, her dad loses his job, and Louis discovers her secret powers, and is captured by the Plant.

Première diffusion : 13 janvier 1998

S4 E20 • L’antidote [2/2]

The final episode. Ray, Louis, and Hunter try to free Alex and her parents from the Plant which is lined with bombs thanks to Danielle Atron. Meanwhile Dave works with Gino and the FDA to stop the chemical plant from releasing GC-161.

Première diffusion : 15 janvier 1998