Leonard and Howard turn to Raj for help in dealing with a work emergency when they nearly come to blows after blaming each other for a potential disaster at the university.
As Sheldon records the final installment of "Fun with Flags," Bernadette is shocked to learn of her co-workers' true feelings from Penny.
When Leonard gets minor surgery on his nose, Sheldon has a major overreaction. Meanwhile Howard and Bernadette work on their marriage in light of Raj's parents' impending divorce.
When the gang recreates a high-school prom night on the roof of the guys' apartment building, Sheldon feels pressure to participate in all the typical romantic traditions.
The guys try to help Penny out of an awkward work dilemma, when a smitten doctor shows up at her door after her flirtatious sales techniques work a little too well.
Sheldon and Raj (series star KUNAL NAYYAR) see if they can survive intense heat - and each other - when they venture deep underground in the name of science.
With the girls away in Vegas for the weekend, the guys try to invent "the next big thing," but only come up with new ways to procrastinate.
Raj's honesty about his past comes back to bite him after his girlfriend, is cold to Penny. Meanwhile, the guys consider becoming part-owners in Stuart's comic-book store.
Howard's nervous when NASA asks him to throw out the first pitch at a game. Also, Leonard & Penny try to prove Sheldon wrong after he claims that he & Amy are a superior couple.
When Sheldon (JIM PARSONS) is forced to teach a class, Howard (SIMON HELBERG) surprises everyone by taking it. Guest star REGINA KING returns as Mrs. Davis.
On the eighth season premiere, Leonard and Amy take an unexpected road trip to Arizona to pick up Sheldon. Meanwhile, Penny interviews for a job at Bernadette's company.
With his entire world changing around him, Sheldon is forced to confront an uncertain future and considers a major move in the seventh season finale.
A horrible day at work prompts Penny to evaluate her life choices - including her relationship with Leonard. Meanwhile, Howard and Bernadette struggle to care for Mrs. Wolowitz.
Professor Proton returns on "Star Wars Day" to offer guidance for Sheldon, while Leonard turns a relationship milestone into a competition with Penny.
When Sheldon tries to be spontaneous on "Anything Can Happen Thursday," it leads to unexpected friction between Penny, Amy and Bernadette.
Penny helps Sheldon cope after he "breaks up" with String Theory. Meanwhile, Howard and Bernadette go on a double date with Raj and Emily.
Series director Mark Cendrowski takes the audience on a guided tour of the non-stop action he and the cast endure every week while filming.
Prepare to enter the eighth dimension of television's perpetual laughter continuum as THE BIG BANG THEORY boldly crosses the frontiers of science and comedy. Doctors Hofstadter & Cooper remain socially challenged, but the two genius roommates and their friends Penny, Howard, Raj, Amy & Bernadette always produce hilarious results.
The Big Bang geniuses return after being thrown for a bell curve in the fifth season of "TV's top-rated comedy" (New York Post). While Leonard has to "debug" his relationship with Penny once more after accidentally proposing to her in the heat of the moment, Sheldon, Howard, and Raj continue to discover the feminine mystique is something that cannot be easily graphed or calculated.
Creator/producers Chuck Lorre ("Two and a Half Men") and Bill Prady ("Dharma & Greg") make comedy a science with the second big season of THE BIG BANG THEORY that makes room for new series regular Sara Gilbert (who starred on "Roseanne" with series star Galecki). Check out the physics of funny!
The ideal comedy experiment continues as The Big Bang Theory continues in its seventh season. Television's number one series follows six of TV's funniest scientists and their street smart neighbor as they discover life, love and laughs in everything from comic-books to cosmonauts aboard the International Space Station.
Leonard and Sheldon are brilliant physicists, socially inept outside of the lab. It's up to free-spirited neighbor Penny to teach them a thing or two about life. While Leonard spends his days looking for love, Sheldon is quite content with their ever-expanding universe of friends, including fellow scientists Raj, Howard and Howard's new fiancée, Bernadette and Penny's "bestie" Amy Farrah Fowler.
Worlds collided last season, when a love affair with Penny (Kaley Cuoco) opened a big, wide, wonderful world of romance for Leonard (Johnny Galecki). Sheldon (Jim Parsons), of course, likes the world just the way it is, thank you. But now, that Leonard and Penny have broken up again, they can test the variables of being neighbors once more.
Johnny Galecki and Kaley Cuocco discuss Leonard and Penny's ever-changing relationship
At work, physicists Leonard and Sheldon conquer the cosmos. At home, however, the real world conquers them. And with one of the universe's greatest mysteries next door - their attractive neighbor Penny - they've got their work cut out from them!
Leonard and Sheldon are brilliant physicists, the kind of "beautiful minds" that understand how the universe works. But none of that genius helps them interact with people, especially women.
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