King of the Banjo is the twentieth episode of the 2013 series of Calimero.
In this episode, Calimero and his dad Gallettoni are going to enter the town's Country Jamboree as a father-and-son banjo-playing team. But the current jamboree champion is the mayor, who lost to Gallettoni once before and he's not about to lose to him again. So the mayor comes up with all kinds of jobs to keep Gallettoni busy so he can't rehearse with Calimero.
You can watch this episode here: http://www.cartooncrazy.me/watch/calimero-2014-episode-20-king-of-the-banjo/