In "Trouble on the St. Johns River," Joey, Bobby and Katy are back to their adventurous ways. But this time, instead of chasing history, they're making it. Joey and Bobby set out to start their summer vacation by going fishing in a local pond, but end up leading a crusade to clean up the environment instead. It's a story of awakening that will inspire kids to become more aware of their environment, and give them some ideas on how to protect and preserve it.