This week's theme is "all things truly wicked" , and this week we're introduced to the siblings, who live in a favela in Rio de Janeiro. They're called "the siblings" because they're the ones who live there, and they have to go back home early to celebrate the birthday of their brother, who's turning eight today. Ooh, it's going to be a big day for the siblings. They have to get ready for their big day, because their brother is turning eight tomorrow. Aww, that's kind of a big deal.