Sub30 examines the goals and desires that parents have for their children as well as the fact that many Colombian men and women are choosing to wait longer to have children. Still, says one young Colombian couple, while one can never be fully prepared to have children, doing so opens the doors to many unexpected life possibilities.

When the events following their initial shock lead to friendship with an eel they encounter in the river, Guillermina and Candelario learn not to judge a book by its cover.

As the festival goes on, we encounter a sixteen-year-old winner of the Best Tiple Player award while some twin singers offer some insight into their particularly well-coordinated voices.

The report regarding couples younger than thirty years old continues. In this episode, two Colombian fathers share their ideas: one about education and the legacy he hopes to pass on to his children, and the other regarding his concern for the safety of his family living in Colombia.

Sub30 introduces us to a clinical psychologist who specializes in transgenerational therapy, which emphasizes the extent to which people subconsciously reenact their family members' behavioral patterns.

Feeling for the vendors who don't get a chance to hear the wonderful music at the Mono Núñez Festival, our host comes up with a plan to take the music to them. He furthermore interviews an Argentinean member of a group who makes Andean music about the similarities and differences between the Andean music made in Argentina and Colombia.

This episode of Sub30 introduces us to a character who, following the death of his mother, travelled across two countries to find the father he never knew.

Our host at the Mono Núñez festival in Colombia continues to interview people who have come to the festival from many countries, expressing his desire to create an integrated musical product: Colombian music with influences from many different countries and cultures.

An itinerant concert at the Mono Núñez gives people who could not otherwise attend the festival the chance to experience some of its music and festivities.

Our behind-the-scenes look at the Colombian Mono Núñez music festival continues with an interview with a group who plays Afro-Colombian music and, has opted to perform but not to enter the festival's contest.

When Candelario loses his bike, he and Guillermina's discovery of a secret passage leads them not only to it, but also to a magical new World of Lost Toys.

Although the World of Lost Toys seems magical at first, Guillermina and Candelario soon realize its shortcomings and plot their escape from it and from the Vine, who looks after the toys there. But, can they find another, happier solution?

This final episode in the series concludes the story of the boy who, following his mother's death, goes in search of his long lost father.

Do the rules and restrictions associated with entering a contest like the Mono Núñez affect the musicians' artistic freedom? In this segment, our host and musicians examine that question.

Guillermina and Candelario go to the beach... to watch television! But, can they agree on what to watch?