Four and a half friends

When Miss Stratmann, the biology teacher, arrives at the school with an convertible sports car, she begins to act in a strange way and is seen wearing a costume just like the one used by thieves who are making their own in the neighborhood.

Nina, the leader of the Ciberpandilla, has bought a Cleverphone 7 and Estefi is desperate to have one at all costs. The opportunity to get the new phone comes up when all the friends get a job as helpers at a small stand in the summer market.

Fred's mother welcomes into her home a man who has just arrived in the city with his dog. Precioso is very suspicious of them because of their strange behavior around Charly's house. The gang will have to figure out what these two new individuals are up to.

When it is known that someone has entered the teachers' room and Miss Janis' earrings have disappeared, everyone is shocked. At the same time, Gerardo, the handsome, thinks he knows who the thief was, so he goes directly to the police to testify. This mystery can only be solved by friends and Precioso.

Rabanito is afraid to fail the next math test: it's an oral test and he doesn't like to speak in public! Meanwhile, the cucumbers begin to disappear from Charly's grandmother's orchard, but they don't know who takes them. The new mission is to find the thief.

Miss Stratmann's bracelet disappears into the girls' locker room of the school gymnasium. The boys offer him the detective services of the Charly and Co. Agency. Although Fred is suspicious of Daniel, one of the school workers.

Friends create a website to promote the Agency. The first case that comes to them is to find a lost kitten that in the end turns out to belong to Gerardo the Handsome. Meanwhile, someone hacks your website and thus begins your new mission: to find the hacker!

During a three-day excursion to a medieval castle, Charly's older sister, Nicole, starts working as an apprentice school monitor. Precioso is not supposed to be able to go with them, yet Fred takes him away, risking getting his friends into a mess. At the same time they have to solve a contagious case.

Fred enrolls Precioso to a casting for a dog food ad. During the first day of filming, his screen partner, Flupi, disappears without a trace along with his diamond necklace. The Friends got a new case to be resolved.

It's Earth Week at school. Gran Segis and Miss Stratmann lead two different environmental projects that will compete in the Municipal Festival. On the other hand, Charly decides to investigate a case on his own.

Gerardo the Handsome hires the Charly and Co. Agency to spy on a man named Mr. Ritter who works in a gym as a personal trainer. Fred joins the gym as an undercover agent and discovers things that will help to solve the gang's new case.

It's Easter and the boys go camping on an island of Vikings with the Great Segis and his family. The island is famous for the existence of a wandering ghost, although no one has ever been able to confirm that it exists.

Miss Brise, a trainee teacher, will choose the best article from among the students to publish in the school diary. Charly has an idea: he will write about their police investigations to win the award.

Miss Janis is renovating her house and asks Charly and Co. if her little puppy Nino can stay overnight with Precioso for a few days. And Precioso will have to watch it! That same day they discover a huge graffiti at the entrance of the school, but who was the author?

Gerardo the Handsome is acting strangely. He dresses like a biker, drives a motorcycle and dates a beautiful 20-year-old girl named Laura who met on a dating social network. What is going on? And why is he acting like this?

Someone has entered Miss Stratmann's house while she is away from the trip, but nothing is missing. Her boyfriend, Paul, believes the thief was looking for his family's comic book collection, which is very valuable. A new case in sight for the gang.

The school organizes a play where both teachers and students perform, including a kiss on the cheek from Miss Stratmann to Fred, who represent being mother and son. At the same time, the boys discover a letter that will introduce them to their new research.

The boys go to the street market, where they see stalls of very cheap branded clothes and Charly suspects that it is stolen or pirated merchandise. There they meet Brassert, a dog trainer and decide to enroll Precioso in classes.

The school organizes a tombola to circumvent the destinations of work practices. The group wins the ballot of the police station without Charly, who has to go to Mr. Rubenacker's stables. While helping the caregiver, something strange happens so the gang has a new case to solve.

A cat named Mimi settles into Precioso's house unexpectedly. The boys take care of her while they look for her master. At the same time, Charly wants to find a man people call "the stupid thief."

The school becomes the set of an episode of Detective Derk, the boys' favorite detective TV series. Some students have the opportunity to do internships on set, but an unexpected attack occurs.

Charly y Co. watch Miss Janis giving a briefcase to a suspicious man and then running away on a bike, while the man disappears out of the back door of a fast food restaurant. This is all very suspicious for the gang, so they will have to figure out what is going on.

A new student, Ben, arrives at the school and befriends Estefi. Charly becomes jealous and suspicious of him. Carl Witt, Ben's father, is accused of stealing some art figurines and the group will try to understand what happened and do justice.

Estefi and Rabanito's father punishes them to stay at home and study mathematics until Rabanito can pass the next exam. But they skip the punishment to help their grandfather, since someone has robbed him.

100 years ago the school started a "time capsule" project. They buried a capsule under a tile at the entrance of the school with a valuable diary of the time inside. Because of this, a new adventure begins for the gang!