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Sheldon moves in with Dr. Sturgis for the weekend to experience college life. A lonely Mary tries to bond with the other Coopers during his absence.

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

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

The Coopers help a broken-hearted Pastor Jeff through a rough patch in his marriage. Meanwhile, Sheldon pressures church members for donations.

Sheldon's selfish demands force Leonard to reconsider their friendship. Meanwhile, Howard tries to pick his astronaut nickname.

When Sheldon is forced to take a vacation by the university, he goes to work with Amy in her neurobiology lab.

When a corner office at the university opens, Sheldon must compete for it with his office nemesis, Barry Kripke. Penny gets an unusual gift from Amy.

A change in Sheldon's routine forces him to re-evaluate his entire life, when his barber is sick. Howard rethinks his decision to go into space.

Sheldon chooses to participate in a guys-only weekend Star Wars gaming marathon rather than go with Amy to her aunt's birthday party.

It's a dream come true for Sheldon when he has a close encounter with his hero, Mr. Spock -legendary sci-fi icon Leonard Nimoy.

When Wolowitz gets to work with world-renowned scientist, Stephen Hawking, Sheldon is willing to do anything to meet his hero.

Howard's wedding plans are in jeopardy after the guys throw him a bachelor party, and details of his sexual history are leaked online.

A Tie Breaker & A Huge Mistake. Tensions rise when new co-owners Georgie and Ruben realise they can't agree on anything. Jim struggles to find his purpose now that he's retired.

Georgie's upset when Mandy's new role as weekend weather girl gets her more attention from the men in town, and Connor turns to Jim for help.

Sheldon invites the entire school to a party for the Nobel Prize announcements. Meanwhile, Meemaw learns more about Dr. Sturgis's past.

After Dr. Sturgis experiences a nervous breakdown, Mary worries Sheldon is headed down a similar path. Georgie finds he has a knack for sales.

Without Dr. Sturgis's university class, Sheldon takes his education into his own hands. Mary helps Pastor Jeff avoid temptation with his girlfriend.

Sheldon leaves town after a fight with Meemaw and his parents. Meanwhile, Georgie tries to impress Veronica with his new business venture.

When NASA reschedules Howard's mission and puts his wedding plans in jeopardy, he's forced to face his fears - and Bernadette's dad.

When Howard and Bernadette decide they want to be married before his NASA space launch, the gang rushes to put on a wedding.

Howard discovers that he can't escape his mother - even in space! Back on earth, meanwhile, Raj turns his existence as a third wheel into an art form.

After learning Penny is thinking about breaking up with Leonard, Sheldon tries to intervene. Howard is being picked on in space by the astronauts.

While the pressure of being in space starts to take its toll on Howard, Amy feels threatened when Sheldon hires a young female assistant, Alex.

When Howard returns from space, he doesn't get the hero's welcome he expected. Meanwhile, Game Night turns into a battle of the sexes.

The gang celebrates Halloween at Stuart's comic book store. Leonard and Penny discover a new spark in their relationship with a scientific seduction.

Sheldon's friendship with renowned scientist Stephen Hawking is threatened by a game of 'Words with Friends.

Amy pursues her dream of being an artist. Chris hopes a vacation will unite the family. Tammy says something unexpected to Amy at her birthday party.

The family heads to New Orleans and Amy is left speechless by a surprise. Andrea tries to find a solution for Tammy's unravelling mental state.

Cystem Shutdown! Gerard has nearly a hundred lumps varying in size all over his body. Eric has a large bump on his head that he calls his 'on/off button.