Atchoo!

In order to impress Crystal, Teo accepts a bicycle challenge that proves to be much more difficult than expected, and is further complicated by his transformations; Barbara decides to help him by playing the part of the trainer.

Crystal decides to enter a painting contest despite being a terrible painter; Teo, helped by Flo and Peter, tries to prevent Crystal from making a fool of herself.

Teo wants to invite Crystal to Luna Park, but his invitation ends up in Barbara's locker, so Teo and his friends must get the invitation back from the clutches of the inappropriate neighbor.

Teo desperately wants to see the second season of Mister Impossible, his hero, but since Peter and Flo can't stay with him, they call Shanti and Goro in to look after Teo and his transformations.

Due to a series of coincidences, Principal Hammer grows convinced that Teo is a quiz genius, and forces him to participate in a TV quiz, hoping that he can help her win a new chair for her office.

Teo realizes that can't often make others laugh; taking advantage of his transformations and with the help of Flo and Peter, he will try to convince his friends of his comedic skill.

Teo, Flo and Peter think that Principal Hammer wants to fire sweet Miss Teach, the boys' teacher, for being too good and kind, so they decide to help the teacher and try to make her look evil and cruel enough to save her job.

Mysterious things happen at school, and the principal blames an innocent Teo; to find the guilty party, a tribunal organizes to judge Teo's innocence or guilt.

Peter picks up a new hobby of making models with toothpicks, and trains to participate in a miniature construction contest.

Crystal has a problem with her teeth, and Teo tries in every way possible to remedy the problem, causing a lot of trouble.

At the sound of the last bell, Barbara walks down the school corridors with a determined step in search of Teo, who hides in the closet with Peter, whose current hobby is being a ninja.

Peter decides to clean up the chaos of the farm barn once and for all and rid it of the most useless things, and brings in Teo and Flo to help.

Teo fears leaving his the house because of the presence of Barbara, his new neighbor who fell madly in love with him, and worries she'll cling to him for the umpteenth time.

Barbara's father Berto falls into depression after letting a mega-lobster escape, so Barbara decides to ask for Teo's help to make her father regain his self-confidence.

Teo feels fascinated by Peter's daily hobby of hypnosis, and asks his friend to hypnotize him in the hopes of stopping his sneezing and transformations; Peter accepts the challenge, to their mutual regret.

Teo can't find an idea to write an article for the school newspaper, so when Miss Teach looks for a volunteer to interview a very important person, he immediately agrees but discovers that it's Principal Hammer.

Flo and Teo want to go to the park to see a show; with a cryptic message, Peter lets them know that he'll await them there; once at the park, Flo and Teo find Peter's bag, even though there is no trace of the boy.

Teo, Peter and Flo are ready to leave for a wonderful day of nature discovery, organized by Teo's dad; Alex makes his appearance, with various equipment.

Nicknames become Peter's new passion of the day, and ever since he arrived at school that morning, he's been doing nothing but giving new and hilarious names to everything that passes under his eyes.

Peter's hobby today is testing everything testable, thanks to his new Encyclopedia of Tests.

Having dined on his mom's dreaded broccoli soup yesterday, Teo looks forward to the one thing able to cheer him up today, the approaching lunchtime.

Peter's new hobby is the study of the ancient traditions of his family, the McDonnels, and for Teo and Flo, it's turns into a day full of fun and surprises.

Goro decides to resign as head of the class, leading to great astonishment, as nobody even knew he was the head of the class; Miss Teach explains that there must always be a head of the class, according to school rules.