After graduating high school, Sheldon has a breakdown when he realizes he may not be ready for college; Dale tries to make amends with Meemaw.
Sheldon gets a summer job at the local train museum; Missy embarks on a new stage of womanhood; Georgie discovers Mary's guilty pleasure.
With college in sight, Sheldon is determined to ride his bike without training wheels; Mary and George Sr. argue over parenting styles.
Meemaw meets Dale's ex-wife, June; Sheldon is forced to work on a group project with reluctant college students.
Sheldon visits the California Institute of Technology for the very first time; Georgie is furious when Mary listens in on a phone call with his girlfriend; Meemaw tries to cheer up a jealous Missy.
Dr. Sturgis is furious when Sheldon accuses him of plagiarism; Mary sets out to find a girl trophy for Missy's end-of-season baseball ceremony; Georgie has an awkward run-in with Veronica while on a date with his new girlfriend, Jana.
When George Sr. accidentally lands the school librarian in the hospital, the Cooper family must nurse her back to health; Meemaw gives Georgie relationship advice.
When Sheldon learns the house next door is for sale, he takes it upon himself to find the perfect neighbors; Missy is torn when she's forced to pitch against her boyfriend at a baseball game.
Sheldon has a scientific breakthrough at the dentist's office; Dale and Meemaw go to the casino; Georgie makes a big mistake when Dale leaves him in charge of the store.
Sheldon discovers that Mary's been keeping a secret about him; Meemaw is furious when she learns Dale fired Georgie.