Bart ends up in the hospital after taking a dare and lies about going to heaven to cover it up, but is forced to confess after Homer takes a deal with Christian producers to make a movie about the whole thing.
Homer wins an oyster-eating contest against the mythical Cthulhu, Springfield is overrun by plant body-snatchers, Lisa finally snaps and Mr. Burns opens a retirement home with some Jurassic upgrades.
Bart feels neglected when Homer and Lisa bond over To Kill a Mockingbird and start spending quality time together, so Marge attempts to help Homer balance attention between the kids.
Motivated by a PTSD episode Grampa had while babysitting the kids, the Simpsons take a journey to Grampa's past as a post-WW2 toy model for plastic army men, and Abe finally faces his on confused sexuality.
On Marc Maron's podcast, Krusty reveals the untold story of his past movie project, The Sands of Space. Hearing the podcast, Bart and Lisa learn their parents were production assistants on the movie in the early days of their relationship.