Sheldon attempts to build a nuclear reactor. Also, a university cocktail party gets heated when Dr. Sturgis’ colleague, Dr. Linkletter, flirts with Connie, and Georgie is heartbroken when he learns Veronica has a boyfriend.

Unhappy that school funds are going towards football rather than academics, Sheldon decides to run for class president.

When Dr. Sturgis bonds with Paige, another 10-year-old genius, Sheldon’s jealousy leads Connie to intervene. Mary invites Paige’s family over for a play date.

When Dr. Sturgis recommends Sheldon and Missy for a university research study on twins, Mary is unhappy when the test results go to Sheldon's head.

Sheldon invites the entire school to a party for the Nobel Prize announcements. Also, Connie learns more about Dr. Sturgis' past, and Georgie's desire for cable TV leads to a standoff between him and George Sr.

When Mary’s faith is shaken by a tragedy in the community, Sheldon becomes an unlikely ally.

Sheldon experiments on Missy, and Georgie joins Mary’s bible study to spend more time with his crush, Veronica.

Things spiral out of control when Sheldon boycotts his favorite bread company. Also, Georgie offers Veronica a shoulder to cry on when she's dumped by her boyfriend.

A video game takes over Sheldon and Connie’s life. George Sr. is jealous when Georgie bonds with Herschel at the auto shop.

Sheldon studies his family for a psychology project. Thanksgiving dinner turns into a family fight when George Sr. is offered a job in Oklahoma.

When Sheldon has to spend a few days in the hospital, he turns into the world’s worst patient. Also, Missy gets a taste of what life would be like without her twin.

Inspired by his hero, Albert Einstein, Sheldon tries his hand at the violin. Also, Mary and Connie secretly buy a pregnancy test when Mary thinks she's pregnant

After Sheldon dismantles the refrigerator to stop an annoying hum, he gets a paper route to pay for the repairs.

When George Sr. asks Sheldon to keep a secret from Mary, the stress of not being honest drives Sheldon to hideout at Tam’s for his first sleepover.

When Sheldon learns that people with stunted childhoods can turn into social outcasts, he tries to act. Connie and Dr. Sturgis' relationship is tested when she teaches him how to drive.

Sheldon and Dr. Sturgis have their first fight when Dr. Sturgis marks a question wrong on Sheldon's test. Also, Mary takes over for Pastor Jeff when he's out sick.

Georgie is thrilled when Veronica stays at the Coopers' house for a few days. Also, Connie and Dr. Sturgis celebrate their one-year anniversary.

The Coopers help Pastor Jeff through a rough patch in his marriage. Also, Sheldon pressures church members for donations when Mary takes him to work for a day.

Mary clashes with Sheldon's drama teacher over plans for a Halloween fundraiser for the church. Georgie falls for a rebellious teenage girl whom Sheldon is tutoring.

Sheldon uses his new friendship with the school bully to boss Georgie around. Also, Missy steals Connie's makeup for picture day.

Sheldon moves in with Dr. Sturgis for the weekend to see what his life will be like in college. Also, a lonely Mary tries to bond with the other Coopers during Sheldon's absence.

Sheldon gets into trouble with fellow child genius, Paige at the science museum. George is forced to play therapist to Paige’s bickering parents. Mary, Georgie and Missy help Connie with a garage sale.