As Fede grows increasingly concerned for the health of Nico, the hamster at the center of his and Kevin's science project, Kevin's brother Leo's behavior becomes increasingly erratic.

As Leo begs his girlfriend to come over, Kevin is eager to wrap up his science experiment in spite of his partner Fede's reservations.

When Kevin's parents go out and his sister neglects her babysitting duties, the tension between Kevin and his brother, Leo, comes to a head over Kevin and Fede's science project. Will their hamster survive? Will Fede and Kevin?

The power struggle between Kevin and Leo continues as their parents attempt to go out for the evening, leaving their sister in charge.

As Kevin and Fede struggle to come up with the specifics of their science project, Kevin's older brother Leo is determined to interfere at every turn.

The time has come to present their natural science project in front of their class, and Kevin and Fede have yet to even begin.

During some sleepless nights, Kevin contemplates the complexity of the universe— as well as his relationship with his brother.

In part three of this episode, we'll find out the judge's verdict: Will she find for Lida or Cleer?

As Lida continues to try to prove Cleer's deception in court, a surprising witness shows up to testify on her behalf.

Today on "Los Casos de Yabla," Lida sues Cleer for failing to help her to cheat on their neurosurgery exam.

After ditching his accordion recital to play soccer, Kevin must face his father.

In order to keep his spot on the soccer team, Kevin must quit his accordion lessons and simultaneously risk disappointing his father. What will he decide?

Can Kevin pawn his accordion off on his brother Leo before he's forced to perform in public?

Although the accordion is definitely not Kevin's cup of tea, he is terrified of quitting for fear of letting his father down.

Disaster seems imminent in the González household as tensions arise between Kevin's father and grandma.