The show follows the adventures of Billy Dilley (Aaron Springer), a 7th grader who loves science, and his lab partners, Zeke (Tom Kenny) and Marsha (Catie Wayne), who on summer vacation find themselves trapped in a strange world located in the Earth's core.
The show was first announced in 2014 as a potential pilot.[3] In March 2016, it was confirmed that Disney XD has greenlit the show for a full series.[2]
In 2015, Merriwether Williams was confirmed in a Twitter post by Vincent Waller as one of the show's writers, whilst character designer Robertryan Cory announced on his Facebook page he has been working on the series for over a year before the pickup was officially sealed.
Trivia
Jessica McKenna was originally going to voice the character Billy Dilley, but was replaced by creator Aaron Springer for unknown reasons.