The guys return from the North Pole but when Sheldon finds out that they tampered with the results of his experiment there he leaves for Texas in disgrace. Going to Texas to bring him back prevents Leonard from hooking up with Penny.
Leonard and Penny's first night together is awkward. Howard and Sheldon have a major dispute over the species of a cricket found in the apartment.
Sheldon discovers a way to get Penny to "behave" better while Howard and Raj dress as Goths and head to a Gothic nightclub in order to pickup women.
Raj's work visa is up and his research has come to a screeching halt. The only way he can avoid returning to India is to take a job working for Sheldon.
Howard gets Leonard and Penny to set him up with one of her co-workers at the Cheesecake Factory and the double date goes surprisingly well. Meanwhile, Sheldon has a showdown at a card game tournament with nemesis Wil Wheaton.
Seeking to learn more about football in order to impress some of Penny's friends Leonard seeks assistance from an unlikely source--Sheldon.
The relationship between Leonard and Penny hits its first bump when they have an argument about an old musician friend of hers from Omaha who's arriving in town and wants to sleep on her couch. Sheldon, who hates controversy and arguments, tries to play the peacemaker.
When Leonard, Raj, and Sheldon head out to the desert to watch a meteor shower, Sheldon is looking forward to a night alone but must come to Penny's aid when she falls in the shower and dislocates her shoulder. Meanwhile, out in the desert, hilarity ensues when they guys consume some drug laced brownies.
Songs: Kaley Cuoco, Jim Parsons -- Soft Kitty
When Kripke pranks Sheldon during his appearance on National Public Radio our hero is determined to seek an exquisite revenge. Meanwhile, Howard begins to have second thoughts about his relationship with Bernadette.
Songs: Simon Helberg -- Bernadette
Trying to learn more about Leonard's job, Penny approaches Sheldon to teach her more about physics. Howard becomes jealous with Bernadette and Leonard start getting along.
Leonard's mother pays him another visit to his and Penny's consternation and Sheldon's delight.
Leonard and Penny have an argument when he discovers that she believes in psychics while Sheldon and Raj meet two girls at a university mixer and invite them back to the apartment.
Leonard and Sheldon return home one night to discover that their apartment has been robbed and ransacked. This causes Sheldon to come unglued and make a decision to move to Bozeman, Montana.
After getting stumped by a difficult physics problem, Sheldon cracks up and eventually goes to work with Penny at the Cheesecake Factory in order to find a solution.
Songs: Murray Head -- One Night in Bangkok
After being invited to Switzerland to see the CERN Supercollider, Leonard wants Penny to join him and make it a romantic Valentine's Day getaway. Sheldon then tries to do anything to take Penny's place. But what will Leonard do when both get sick?
Ruining his one and only chance at meeting Stan Lee, Sheldon winds up in traffic court because of illegal driving that he did when he drove Penny to the hospital (episode 308). However, as Leonard, Howard and Raj are all going to see Stan Lee, Penny is Sheldon's only hope of avoiding jail.
Special Guest Stars: Stan Lee
as Himself |
The guys buy a box of junk at a garage sale and find something precious inside, a prop ring from The Lord of the Rings that causes friend to go against friend.
Sheldon wins an award and is reluctant to accept it since he must give a speech before a large crowd. Each of his friends tries to help in his/her own way.
Songs: Jim Parsons -- The Element Song
Leonard's relationship with Penny hits rocky water after he utters the "L" word. The guys take on a team led by Wil Wheaton in a bowling tournament.
With Leonard and Penny now split-up, Sheldon becomes the peacemaker.
Sheldon has a famous female physicist friend stay with he and Leonard and becomes upset when Leonard and his friend become intimate.
Leonard and Sheldon's argument leads to Leonard sleeping on Penny's couch and relating how he met Sheldon. The story of the broken elevator also is revealed.
Penny realizes that after dating Leonard, she can no longer put up with the guys of limited intelligence that guys she normally dates. Howard and Raj try to find Sheldon a date on the Internet.