Season 3

Season 3 of The Big Bang Theory returned to television on September 21, 2009, and contained 23 episodes. It 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.
==Cast==
=== Main Cast ===
* Johnny Galecki as Leonard Hofstadter (23/23)
* Jim Parsons as Sheldon Cooper (23/23)
* Kaley Cuoco as Penny (23/23)
* Simon Helberg as Howard Wolowitz (23/23)
* Kunal Nayyar as Rajesh Koothrappali (23/23)
=== Recurring Cast ===
* Carol Ann Susi as Debbie Wolowitz (4/23)
* John Ross Bowie as Barry Kripke (2/23)
* Wil Wheaton as himself (2/23)
* Kevin Sussman as Stuart Bloom (4/23)
* Melissa Rauch as Bernadette Rostenkowski (5/23)
* Ian Scott Rudolph as Captain Sweatpants (3/23)
* Owen Thayer as Lonely Larry (2/23)
=== Guest Cast ===
* Laurie Metcalf as Mary Cooper
* Brian George as V. M. Koothrappali
* Alice Amter as Mrs. Koothrappali
* Christine Baranski as Beverly Hofstadter
* Sara Gilbert as Leslie Winkle
* Brian Thomas Smith as Zack Johnson
* Lewis Black as Professor Crawley
* Molly Morgan as Bethany
* Sarah Buehler as Sarah
* Andy Mackenzie as Skeeter
* Elizabeth Bogush as Catherine Millstone
* Oliver Muirhead as Professor Laughlin
* Zachary Abel as Todd
* Jason Mesches as Denny
* Danica McKellar as Abby
* Jen Drohan as Martha
* Julio Oscar Mechoso as Officer Hackett
* Yeardley Smith as Sandy
* Kevin Brief as Glenn
* Steve Paymer as Judge J. Kirby
* Marcus Folmar as Guard
* Frank Maharajh as Venkatesh Koothrappali
* Judy Greer as Elizabeth Plimpton
* Ally Maki as Joyce Kim
* Steven Yeun as Sebastian
* Ajgie Kirkland as Louie
* Lauri Johnson as Mrs. Gunderson
* Mayim Bialik as Amy Farrah Fowler
* Katee Sackhoff as Herself
* Ira Flatow as Himself
* Stan Lee as Himself
* James Earl Jones as Himself
* Stephen Hawking as Himself
* Elon Musk as Himself
==Episodes==
Episode (Series)	Episode (Season/Ep#)	Title 	Original Air Date 	Directed By 	Description
41 	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.
42 	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.
43 	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.
44 	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.
45 	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.
46 	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.
47 	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.
48 	308 	The Adhesive Duck Deficiency 	November 16, 2009 	Mark Cendrowski	Leonard is with Raj 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.
49 	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.
50 	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.
51 	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.
52 	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.
53 	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.
54 	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.
55 	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.
56 	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.
57 	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.
58 	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.
59 	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.
60 	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. 
61 	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. 
62 	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. 
63 	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.
==Gallery==
Season 3 Poster.jpg|Poster.
The gang (Season 4 Promo Photoshoot).jpg|The gang.
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Category:Seasons
 Season 03
Category:Howard Wolowitz
Category:Bernadette Rostenkowski-Wolowitz
Category:Amy Farrah Fowler
Category:Sheldon Cooper
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it:Terza stagione
pt-br:3ª temporada