In the wake of the hamster incident, Kevin and Leo's relationship is strained, to say the least.

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.

Will Lola be able to claim her lottery winnings? And will Pablo finally connect with Emilia? Find out the answers to these questions and more in this episode finale.

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.

It's ten to ten, and they're about to broadcast the winning numbers for La Primitiva lottery. Lola is extremely upset because neither Sam nor Pablo has found her ticket. Will it turn up?

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

What idea will Pablo come up with to find the winning lottery ticket? And why is Lola mad at Sam?

Pablo and Sam are in trouble with Lola! They've returned to the apartment, but they've lost the winning lottery ticket. Can Lola claim her prize on time?

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

Lola and Ana fantasize about everything they will do with the prize money from Lola's winning lottery ticket. What could possibly get in their way?

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

Everything seems to be going well for the characters on Extra. Pablo got an attractive girl's number, and it seems like Lola's has won the lottery at last!