Watch Billy Dilley's Super-Duper Subterranean Summer (2017– ) full episodes online.
Synopsis: Science-obsessed youngster Billy Dilley's summer break takes an unexpected turn when he and lab partners Zeke and Marsha get stuck in a bizarre world underneath Earth's surface.The trio's only way out is to repair Billy's science fair project, the Cheeserator. As the kids work together to get back to their own world, Billy's endless curiosity instigates wild adventures in the subterranean playground. For Billy, Zeke and Marsha, the most important scientific discovery they make while underground is friendship.
Creator: Aaron Springer
Stars: Aaron Springer, Tom Kenny, Catherine Wayne
More information: IMDB, Wikipedia