Aritz Castro De las Heras is a 24-year-old from Santurtzi (Vizcaya). He claims that he does not own a television, he nevers surfs the internet and he has never watched the show before entering the house. His secret is that he is the only contestant without a secret to keep. During the first week, appeared on the Internet several Aritz social networks, as well as his personal blog. He guessed that Marina wasn't mother in week 2. He finished as the runner up on Day 102.