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Season 3: 2009-2010
This list of episodes is for the third season of the American sitcom The Big Bang Theory, that was originally aired on CBS from September 21, 2009 to May 24, 2010 over 23 episodes. It has received higher ratings than the previous two seasons with over 15 million viewers. The main focus of the season was the romance between Leonard and Penny which was hinted at the end of Season 2.
Season 3 of The Big Bang Theory returned to television in September 21, 2009 and contained 23 episodes.
|Episode (Season/Ep#)||Title||Original Air Date||Directed By||Description|
|301||The Electric Can Opener Fluctuation||September 21, 2009||Mark Cendrowski||Following his return from the Arctic, Sheldon is very excited over the prospects that his research in the Arctic has yielded until he learns that the guys fudged his data. Penny is happier than most now that Leonard is back.|
|302||The Jiminy Conjecture||September 28, 2009||Mark Cendrowski||The guys discover Leonard is not as happy with the sex, while Sheldon, Howard and Raj are on a quest over a bet involving a cricket.|
|303||The Gothowitz Deviation||October 5, 2009||Mark Cendrowski||After an accident causing Penny's bed to break, Sheldon must deal with Penny staying in his apartment. Raj and Howard and going to a Goth bar to meet girls.|
|304||The Pirate Solution||October 12, 2009||Mark Cendrowski||Raj must find a new job or be sent back to India. Sheldon has a solution, which is to allow Raj to work "for" him, rather than work "with" him. Raj reluctantly accepts the offer. Howard is lonely and tries hanging out with Leonard and Penny.|
|305||The Creepy Candy Coating Corollary||October 19, 2009||Mark Cendrowski||Sheldon enters a trading-card competition upon learning that Wil Wheaton, who he hates for not coming to a sci-fi convention he went to, will also be attending. Howard gets Leonard to have Penny set him up with a blind date, a girl named Bernadette.|
|306||The Cornhusker Vortex||November 2, 2009||Mark Cendrowski||Sheldon, who grew up in Texas where football was popular, teaches Leonard how to understand it so that he can try to fit in with Penny's friends. Howard and Raj have a dispute during their kite fighting game.|
|307||The Guitarist Amplification||November 9, 2009||Mark Cendrowski||An argument between Leonard and Penny causes Sheldon to freak out with the couple treating him like they are his surrogate parents.|
|308||The Adhesive Duck Deficiency||November 16, 2009||Mark Cendrowski||Leonard is with Rajesh and Howard on a camping trip to watch the Leonid Meteor Shower, but all three succumb to 'magic' cookies they get from Deadhead campers nearby. Sheldon comes to Penny's rescue after she dislocates her shoulder and Sheldon has to drive her to the hospital.|
|309||The Vengeance Formulation||November 23, 2009||Mark Cendrowski||Wolowitz's new girlfriend, Bernadette, asks him where their relationship is going after their third date. He avoids her for a week and gets some relationship advice from his own fantasy characters. Sheldon plans revenge against his arch-nemesis Barry Kripke.|
|310||The Gorilla Experiment||December 7, 2009||Mark Cendrowski||Bernadette shows an interest in physics and gets invited to watch Leonard's experiment which makes Wolowitz jealous. Penny then asks Sheldon to teach her a little physics so she can understand Leonard's work.|
|311||The Maternal Congruence||December 14, 2009||Mark Cendrowski||A visit from Leonard's mother, Dr. Beverly Hofstadter, delights Sheldon and horrifies Leonard. Penny is upset because Leonard didn't mention his mother's visit to her.|
|312||The Psychic Vortex||January 11, 2010||Mark Cendrowski||Sheldon and Koothrappali attend a university mixer and get dates with Abby (Danica McKellar) and her friend Martha (Jen Drohan). Leonard and Penny get into a fight over her belief in psychics.|
|313||The Bozeman Reaction||January 18, 2010||Mark Cendrowski||When their apartment is robbed and their TV, video games, and computers are stolen, Leonard and Sheldon turn to Howard to create a state-of-the-art security system. Sheldon gets caught in the security net and decides he needs to leave Pasadena.|
|314||The Einstein Approximation||February 1, 2010||Mark Cendrowski||Sheldon's search for the answer to a physics problem keeps him up all night for several days making him both obsessed with finding the answer and crazier than usual. He end up in a mall ballpit shouting "Bazinga!" at Leonard and working with Penny at the Cheesecake Factory.|
|315||The Large Hadron Collision||February 8, 2010||Mark Cendrowski||Leonard announces he is taking Penny to see CERN's Large Hadron Collider in Switzerland, Sheldon reminds him that their Roommate Agreement dictates that he should take him.|
|316||The Excelsior Acquisition||March 1, 2010||Peter Chakos||Sheldon misses his chance to meet comic book legend Stan Lee when he has to attend traffic court after receiving a ticket because of Penny.|
|317||The Precious Fragmentation||March 8, 2010||Mark Cendrowski||On the way to buy Chinese food, the guys see someone that looks like Adam West and follow him to a garage sale, where they buy a box of merchandise for 60 dollars. They ignore Penny's anger at not getting food, and among other things they find a 'Lord of the Rings' ring which tests the gang's friendship.|
|318||The Pants Alternative||March 22, 2010||Mark Cendrowski||Sheldon's friends come to his aid when his fear of public speaking stands between him and a coveted award. Penny helps him calm his nerves with wine and ends up addressing the audience drunk.|
|319||The Wheaton Recurrence||April 12 2010||Mark Cendrowski||
One night after making love, Leonard surprises Penny by saying "I Love You," but she can only say to him is "Thank You". The situation gets worse when they end up between Sheldon and Wil Wheaton during a bowling tournament.
|320||The Spaghetti Catalyst||May 3, 2010||Anthony Rich||Leonard and Penny have broken up. Sheldon meets Penny decide to have dinner together and Sheldon must deal with being friends with Leonard's ex-girlfriend.|
|321||The Plimpton Stimulation||May 10, 2010||Mark Cendrowski||Dr. Elizabeth Plimpton comes to Caltech as Sheldon's guest and has quite a sexual appetite which makes Penny quite jealous.|
|322||The Staircase Implementation||May 17, 2010||Mark Cendrowski||Leonard tells Penny the story of how he first met Sheldon, meeting Howard and Raj, Leonard's affair with Joyce Kim and how the elevator got broken.|
|323||The Lunar Excitation||May 24, 2010||Peter Chakos||The guys set up an experiment on the building's roof to bounce a laser off the moon and invite Penny and her date to join them. Penny learns that she can no longer tolerate dumb men and ends up sleeping with Leonard. Raj and Howard find a match for Sheldon, Amy Farrah Fowler.|