When ever-unfit Jack enters a fun run for Sport Relief, Dani and Sam are convinced he will never make it round the course and so offer to sponsor him for ridiculous amounts of money. It soon becomes clear that Jack is taking his running all too seriously. Dani decides to undermine her best friend. Meanwhile, Max sees Jack's run as the perfect way to raise some sponsorship cash for his own favourite cause - himself.

Sam, Jack and Ben are all sick of Dani and Max's endless fighting. They agree that Dani and Max would get on better if they understood each others' lives better, and force them to swap places for a day. Unfortunately, it's the day of an important audition for Dani and a major chess match for Max. How will each of them ever manage?

Dani is asked to go on a popular afternoon chat show, but worries that her life isn't interesting enough to talk about. Jack plans to create a behind-the-scenes video of Dani to help the situation, but it proves to make it worse. Eventually, Dani discovers that just being herself is by far the best thing. Meanwhile, Max wants Ben to run in the school elections, but makes it clear that Ben will be a real puppet - with Max pulling all the strings!