S1 E1 • Your Cheatin' Heart

A boy named Tanner asks Keely out, but Phil doesn't really like him. One day when Phil is doing a skit on stage a girl named Darcy walks in and asks the teacher that if he sees Tanner to tell him that she stopped by. Phil thinks this is kind of weird, so, using his Instamorph, he changes into Tanner and goes to investigate. He finds out that Darcy is also Tanner's girlfriend and that he is two-timing Keely, but when he tells her she just gets mad at him. Later, while Keely and Tanner are doing a skit on stage Darcy walks in and kisses Tanner right in front of Keely! Meanwhile, Pim tries to get Debbie and Bradley to break-up.

Première diffusion : 18 juin 2004

S1 E2 • Unification Day

Phil skips Unification Day to go to a party that he can't even get in to. Pim cheats on a cooking assignent, so she has to bake something homemade.

Première diffusion : 18 juin 2004

S1 E3 • Meet the Curtis

The Diffy's discover Curtis the Caveman stowed away in the time machine and now it's up to Lloyd to decide if they should keep him. Pim goes to Debbie's sleepover and tries to find a way out.

Première diffusion : 18 juin 2004

S1 E4 • Phillin' In

Lloyd and Barbara decide to go on a weekend road trip for their anniversery. They leave Phil in charge of Pim and if everything goes right then Phil will get an afterburner for his skyak. Once Pim hears this she is not happy and tries everything in her power to make the weekend go bad so Phil won't get the afterburner.

Première diffusion : 18 juin 2004

S1 E5 • Tanner

Phil is sent to second grade to work on his writing after he messes up on his cue cards for the news. Pim cheats on a test and her conscience bothers her.

Première diffusion : 25 juin 2004

S1 E6 • Raging Bull

Phil gets detention and goes to the dance with his new "guy friends." But when a bull attacks his new friend, he morphs it into a cat. Pim is tardy too many times, so she dresses Curtis up as her father to get off being punished.

Première diffusion : 2 juillet 2004

S1 E7 • My Way

Phil helps Keely with her stage fright so Phil shrinks himself and sits on her microphone during her performance; Pim and Bradley become co-parents of a bag of flour as part of a class assignment on raising a baby.

Première diffusion : 9 juillet 2004

S1 E8 • Daddy Dearest

Phil and Pim worry that Lloyd will embarrass them when he plans to play American folk music at their school concert; Barbara takes Curtis to a dentist when he gets a toothache.

Première diffusion : 23 juillet 2004

S1 E9 • Phenomonally Yours

Phil tries to dissuade another girl's affections; Pim joins the orchestra to sabotage Debbie's solo; Pim meets Bradley Benjamin Farmer.

Première diffusion : 6 août 2004

S1 E10 • Future Tutor

Pim and Phil start school in 2004. Phil meets Keely and offers to tutor her in Algebra. Pim tries to get through her first day of school.

Première diffusion : 13 août 2004

S1 E11 • Future Jock

Phil uses a futuristic gadget to compete in the gymnastics tournament.

Première diffusion : 13 août 2004

S1 E12 • You Say Toe-Mato

Phil and Keely go to the Tomato Ranch. But Phil is worried about going in the tomato mashing tub as he only has 4 toes.

Première diffusion : 13 août 2004

S1 E13 • Doggie Daycare

Phil and Keely start a day-care service for dogs to earn money for concert tickets. Phil uses a futuristic gadget to understand what a dog is saying.

Première diffusion : 27 août 2004

S1 E14 • We'll Fix It in Editing

A school video project causes Phil to overlook his friends' feelings; Pim is recruited for a track meet.

Première diffusion : 1 octobre 2004

S1 E15 • Halloween

Debbie enlists everyone is school to help her bake cupcakes except Pim. But soon enough Pim is forced into giving the drum beat to the bakers. Phil and Keely try to help the helpless bakers.

Première diffusion : 8 octobre 2004

S1 E16 • Age Before Beauty

Keely uses the "New-Ager" and pretends to be a substitute teacher, but she then gains the attraction of Mr. Hackett.

Première diffusion : 12 novembre 2004

S1 E17 • Neander-Phil

Phil tries to impress the mayor's daughter but things get bad when he switches places with Curtis. Pim realizes that she can't stand Debbie and doesn't even want to be her friend.

Première diffusion : 10 décembre 2004

S1 E18 • Double Trouble

Phil defends Pim against a bully and then he gets bullied. Curtis takes the neighbor's lawn ornaments and calls them his "friends."

Première diffusion : 1 janvier 2005

S1 E19 • Milkin' It

Phil and Keely enter a science fair featuring next Century's "milk engine" sending Lloyd into a state of panic that the Diffys will be discovered. Phil and Keely sneak into the fair to retrieve the evidence so the Diffys can remain in Pickford.

Première diffusion : 25 mars 2005

S1 E20 • Corner Pocket

Phil and Keely pretend to be in cheerleading to impress Mrs. Teslow. Pim tries to find the one thing that Debbie can't stand.

Première diffusion : 8 avril 2005

S1 E21 • Team Diffy

Phil's future "friend" comes to 2121. He offers the Diffy's a way to get home. Will Phil choose the right decision?

Première diffusion : 28 octobre 2005