Claire gets Phil to agree to sell the old family station wagon; Mitchell decides to build a princess castle for Lily; Manny invites a girl over to study.
Carl wants Eddie to pursue a career as a professional basketball star, and he convinces a player from the National Basketball Association to visit the house.
Sheldon enflames a heated argument over the internet; Missy comes to the defense of her basketball team's boys; George Sr. bonds with Meemaw's new boyfriend.
George Sr. is given a lucrative job offer by the university, who hopes to convince Sheldon to join them; Georgie begins working alongside Meemaw's boyfriend.
Mary decides to involve Pastor Jeff when Sheldon is not asked to attend Billy's upcoming birthday party; George Sr. and Dr. Sturgis spend bonding time together.
Sheldon feigns an illness to get out of taking a school swimming test; Dr. Sturgis attempts to learn any further information about Meemaw's new boyfriend.
Chandler refuses to give back a cheesecake accidentally delivered to his apartment; Phoebe gets angry with Joey when he blows off dinner with her for a date.
Monica regrets telling a woman about a discount bridal shop when they fight over the same dress; Joey and Ross discover that they're dating the same girl.
Penny's flirty sales method winds up attracting a lovesick doctor; Amy and Bernadette debate whether female scientists should be more sexually appealing.
Bernadette and Amy organize a high school prom on the rooftop of the guys' apartment complex; Sheldon feels forced to take part in the idealistic prom rituals.
An online critic picks apart Leonard and Sheldon's physics paper; Penny, Amy and Bernadette reflect on some of their more shameful moments from the past.
Amy discovers that Sheldon has requested a one-way trip to colonize Mars; Leonard surprises Penny with an "adult" item; Raj prowls around Emily's apartment.
An article about Sheldon and Leonard's joint research paper fails to recognize Leonard; a power outage at Mrs. Wolowitz's house results in a final dinner.
Sheldon and Amy construct a fort and have their first sleepover; meanwhile, Howard receives a visit from an unexpected guest who claims to be his half-brother.
Gloria decides to cook more traditional Colombian meals; Claire finds out that Alex likes a boy; Mitchell and Cameron fight over Mitchell's aversion to PDA.
Claire becomes a neighborhood vigilante to stop a speeding car; Phil tries to land important listing; Jay teaches Manny to ride a bike; mysterious neighbor.
The kids try to surprise Phil and Claire, but they get surprised; Jay and Gloria's getaway is thwarted; Mitch and Cam try to get into a trendy restaurant.