In SpongeBob SquareCast, a young fan explains SpongeBob SquarePants to an older person. American teenager Stelly enlightens her Scottish stepfather Gavin on the Nickelodeon cartoon. Gavin had never seen the show before this podcast. The result is an adorable and funny podcast that gives a new perspective on the TV cartoon.

SpongeBob SquarePants premiered in 1999 and has since turned into a media franchise. The show has spanned fourteen seasons and created three feature films. It has inspired comic books, video games, theatrical shows, and theme park rides. SpongeBob, Squidward, and Patrick are some of the best-known characters in children's TV. Other much-loved characters include Gary the Snail, Sandy, and Plankton. SpongeBob lives in a pineapple in the Bikini Bottom neighborhood. He works at a local restaurant, The Krusty Krab, flipping burgers. SpongeBob has a habit of attracting trouble. The show has gained many fans because of its eccentric storylines.

SpongeBob SquareCast begins at the show's first episode. Despite the cartoon's youthful focus, this podcast makes SpongeBob funny for an older audience. Each podcast episode explains a SpongeBob episode moment by moment.

The hosts start by speaking about what they've been doing recently. They discuss films they've watched and their hobbies. Then they discuss the episode they've recently watched. Gavin then shares facts about the episode, including release dates and writers. He mentions some key cultural references from the episode, such as parodies of films. Stelly then narrates the episode scene by scene to her stepdad. The hosts' interactions are amusing and often go off on tangents. Gavin asks questions about the plot and shares his amusement with the story. Stelly, a longtime fan, can explain references within storylines in detail.

SpongeBob SquareCast episodes are around 30 minutes long. For the best experience, listeners should start with the first episode.