Alex and Raymond are continually harassed by upperclassmen Jessica and Ellen. One afternoon Jessica trips Alex in the school cafeteria as Alex carries a tray full of food. A food fight ensues and Vice Principal Heller assigns Alex, Raymond, Jessica and Ellen to clean up the cafeteria every afternoon. Both sets of friends blame each other for the trouble, and they agree to take up Raymond's challenge of two-on-two on the basketball court. The stakes: the losers have to admit responsibility to Heller and clean up the cafeteria by themselves.

At career day at the plant, Alex is taped using her powers and she, Ray and Annie have to sneak back and get the tape.

The big dance is just around the corner and Alex still hasn't been asked by the only person she cares to go with. Everybody knows she dreams of going with Scott, but he's not the one hounding her for a date. Jerry, an obnoxious, insensitive and persistent ninth-grader is relentless in his pursuit of her. He won't take no for an answer, but Alex continues to put him off.

Alex asks her sister for help with a class science project, but ends up using her power to impress the teacher. This gets her into trouble when the teacher believes that the project was done by Annie, not Alex. Meanwhile, Dave and Vince disguise themselves as janitors in an attempt to find Alex.

On her way home from school Alex Mack is practically hit by a truck. The truck is carrying a top-secret chemical and spills it on Alex. Alex learns later that she has magical powers and shares this secret with her sister, Annie, and best friend, Raymond.

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

There is only one problem with Alex's new boyfriend: he's also dating Annie. In what turns out to be an innocent set of circumstances, Alex must walk away from a guy with real potential. Annie's broken heart is made worse by the fact that Barbara is following her around for a science experiment.

Annie's science project has been chosen as a finalist for the big science fair to be held at the Paradise Valley Chemical Plant. The whole Mack family is looking forward to spending Saturday at the science fair rooting Annie on, except Alex. Not only is she sick of witnessing Annie's triumphs, but the chemical plant is the worst place for her to be. It's crawling with plant spies who are constantly on the look out for "the kid."

Alex, Raymond, and Nicole are facing their first junior high school midterm in history class. Libby, the most popular girl in school, has her own ideas about surviving the midterm and studying isn't one of them. Libby decides to pull the fire alarm right before the exam.

Alex and Ray have a falling-out and Alex is afraid Ray will disclose her secret to the plant.

In anger, Alex jeopardizes her mom's job. Later, she tries to make it up to her.

A reporter from the Planet newspaper comes to the Macks' house to do a story; Alex's cold makes her powers go haywire.

Annie considers going away to school. Meanwhile, Alex's powers are going haywire and she must convince Annie not to go.

Alex uses her powers to save Ray after he freezes at a school music recital.

Alex and Dad have trouble connecting. They go on a day trip together and chaos ensues.

The plant closes in when Alex's journal, detailing her powers, ends up in the wrong hands.

Alex shows Dad the meaning of "good golf" when they enter the plant's father-daughter golf tournament.

Alex, Raymond, Nicole and Robyn notice a new neighbor moving in. It turns out to be Louis Driscoll, a cool-looking kid with a wisecracking attitude. The more Raymond likes him, the more Alex doesn't.

The morning before Halloween, Alex and Ray come across Paradise Valley's haunted house while delivering newspapers. The next day, Louis convinces Alex and Ray to check out the old house. When Alex takes a closer look, she's sucked in by a mysterious light and comes face-to-face with the woman of the house.

Short on cash, Alex baby-sits Kelly's little sister and is accused of stealing.

Alex steals a test to help Nicole, who is cracking under the pressure of the exam. At the plant, George discovers that GC-161 has the capability to alter human genetic structure.

After a collision with a pole during a baseball game, Ray gets superpowers and goes public. He even negotiates an endorsement deal with the plant. When Ray finds himself trapped and submitted to test after test, he uses his powers to escape from the plant.

Alex makes the track team, but will she compete in the big meet once she realizes the plant is spying on her?

Grounded, Alex sneaks out for a game of roller hockey and a night of trouble.

Alex and George discover that gifts and decorations aren't as important as the Christmas spirit, while Dave's gift to Vince is a chimp that runs amok in the plant.