The Big Bang Theory
Show summary: Created by writer/producers Chuck Lorre (of Two and a Half Men) and Bill Prady (of Gilmore Girls) comes The Big Bang Theory, a sitcom that shows what happens when hyperintelligent roommates/physicists Sheldon and Leonard meet Penny, a beautiful woman moving in next door--and realize they know next to nothing about life outside of the lab. Rounding out the crew are the smarmy Wolowitz, who thinks he's as sexy as he is brainy, and Koothrappali, who suffers from an inability to speak in the presence of a woman.
The show distinguishes itself by being unafraid to toss scientific references and technobabble into an otherwise standard sitcom, even employing a physicist to keep things accurate. In doing so, it allows Sheldon and Leonard to do for science what Frasier's Crane brothers did for fine dining, art, and opera.
Theme Song: "The History of Everything" by Barenaked Ladies
Episodes
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Season 5 Episode 10
Sheldon becomes jealous when Stuart from the comic-book store asks Amy out on a date, and Sheldon's forced to reconsider his relationship with Amy -
Season 5 Episode 8
Amy is crushed when Bernadette and Penny go shopping for wedding dresses without her -
Season 5 Episode 7
Leonard feels threatened when a charming comic-book artist comes between him and Priya; and Sheldon is determined to scare his friends on Halloween -
Season 5 Episode 6
Sheldon's mom visits, and he competes for her attention, which seems more focused on his friends. -
Season 5 Episode 3
Leonard and Amy get to know each other better, while Howard and Bernadette spend the weekend with Mrs. Wolowitz. -
Season 5 Episode 2
Penny and Sheldon clash, and Amy is caught in the middle of their battle; and Leonard looks for ways to keep his long-distance romance with Priya alive. -
Season 5 Episode 1
In the fifth-season opener, Penny hits a low point when she realizes what she's done by sleeping with Raj; and Sheldon becomes the leader of the paintball team -
Season 4 Episode 24
In the fourth-season finale, Raj moves in with Sheldon when Leonard and Priya's "Star Trek" bedroom fantasy is too much for him; and the guys tease Howard when Bernadette gets her PhD, making Howard the only one without ... -
Season 4 Episode 23
Howard finally tells his mother that he's marrying Bernadette, and the news puts her in the hospital. -
Season 4 Episode 22
Raj makes an attempt to cure his phobia of talking to women; and Penny spies on Leonard and Priya with the help of Bernadette. -
Season 4 Episode 21
Priya uses her legal expertise to rip apart Sheldon's roommate agreement, and the women take the flustered Sheldon out dancing -
Season 4 Episode 20
Sheldon and Amy spread gossip as part of an experiment; and Howard and Bernadette's relationship gets serious. Physicist Brian Greene has a cameo -
Season 4 Episode 19
The guys become sleuths to find out who hacked Sheldon's online-game account -
Season 4 Episode 18
Leonard is forced to choose between Penny and his new girlfriend, Priya; Howard's magic trick drives Sheldon crazy. -
Season 4 Episode 17
Sheldon is upset when he realizes Leonard is the center of their group of friends. -
Season 4 Episode 16
Wolowitz considers taking things with Bernadette to the next level; Leonard and Raj's sister rekindle their relationship. -
Season 4 Episode 15
A wealthy donor makes Leonard question what he is willing to do for science. -
Season 4 Episode 14
Sheldon takes acting lessons from Penny in hope of becoming a better teacher; Koothrappali fantasizes about his friend's girlfriend. -
Season 4 Episode 13
Bernadette runs into her ex-boyfriend (Rick Fox) while attending a science event with Wolowitz. -
Season 4 Episode 12
Leonard's idea for a smartphone app derails his friendship with Sheldon. -
Season 4 Episode 11
The guys enter a costume contest with Penny's new boyfriend. -
Season 4 Episode 10
Amy realizes she has feelings for Penny's ex; Koothrappali and Wolowitz try to prove who would be a better superhero. -
Season 4 Episode 9
Penny asks Leonard to lie to her father (Keith Carradine); Howard, Raj and Bernadette pull an all-nighter at a telescope. -
Season 4 Episode 8
While the guys camp out for a long-awaited movie screening, Penny and Bernadette invite Amy to her first slumber party. -
Season 4 Episode 7
Howard baffles Sheldon when he won't accept his apology; and an FBI agent (Eliza Dushku) interviews the guys for Howard's security clearance. -
Season 4 Episode 6
Leonard keeps an affair secret from Sheldon, Howard and Raj. -
Season 4 Episode 5
Leonard realizes he's the only one without a girlfriend, while Sheldon wants to get rid of his. -
Season 4 Episode 4
An embarrassing secret of Wolowitz's is revealed; Raj and Sheldon get into a war at work. -
Season 4 Episode 3
When Sheldon searches for an alternative to human companionship, the guys become concerned. -
Season 4 Episode 2
Realizing he will not live long enough to download his consciousness into a robot body, Sheldon tries to extend his life span. -
Season 4 Episode 1
Penny tags along on Sheldon's first date; Wolowitz finds a new use for a robotic arm. -
Season 3 Episode 23
While Penny worries that dating Leonard has ruined her for normal guys, Wolowitz and Koothrappali search for Sheldon's perfect match online. -
Season 3 Episode 22
Leonard tells Penny about how he met Sheldon for the first time...and what happened to the elevator. -
Season 3 Episode 21
Leonard and Sheldon compete for the attention of a famous female physicist. -
Season 3 Episode 20
When Leonard and Penny aren't speaking, Sheldon goes to extremes to keep them both happy. -
Season 3 Episode 19
A fight between Leonard and Penny threatens their relationship, while Sheldon battles Wil Wheaton in bowling. -
Season 3 Episode 18
Sheldon's friends come to his aid when his fear of public speaking stands between him and a coveted award. -
Season 3 Episode 17
When the guys find a ring from "The Lord of the Rings" at a garage sale, it threatens to tear them apart. -
Season 3 Episode 16
Sheldon winds up in traffic court when he gets a ticket because of Penny. -
Season 3 Episode 15
Leonard can only bring one guest on a trip to see CERN's Large Hadron Collider (the world's largest and highest energy particle accelerator) in Switzerland on Valentine's Day. -
Season 3 Episode 14
Sheldon's search for the answer to a physics problem leads him to work at the Cheesecake Factory with Penny. -
Season 3 Episode 13
A robbery of their apartment sees Leonard and Sheldon call on their friends to devise a security system. -
Season 3 Episode 12
Leonard is aghast to find out a secret of Penny's: she believes in psychics. Meanwhile, Sheldon tries to assist Koothrappali in picking up a girl at a university party. -
Season 3 Episode 11
Leonard's mother (Christine Baranski) visits, which pleases Sheldon but upsets Leonard. . -
Season 3 Episode 10
Sheldon attempts to help Penny understand Leonard's work, and Wolowitz becomes jealous when Leonard starts hanging out with his new girlfriend. -
Season 3 Episode 9
Barry Kripke embarrasses Sheldon on NPR, and the gang rallies to help him get his revenge. Wolowitz, desperate to keep his romance with Bernadette alive, gets advice from a fantasy version of Katee Sackhoff. -
Season 3 Episode 8
With Leonard, Howard and Raj away camping in the desert, an injured Penny has only Sheldon to rely on. -
Season 3 Episode 7
A squabble between Leonard and Penny sees Sheldon playing mediator, though out of his own incovenience from the sitiation rather than altruism. -
Season 3 Episode 6
Sheldon teaches Leonard how to understand football while a kite-fighting incident threatens Howard and Raj's friendship -
Season 3 Episode 5
Sheldon seeks revenge on his nemesis, Wil Wheaton; Wolowitz wants Penny to set him up with one of her friends. -
Season 3 Episode 4
Raj must find a new job or be sent back to India, but Sheldon has a solution, which leaves Leonard and Penny dealing with Howard as third wheel. -
Season 3 Episode 3
Howard takes Raj along to check out the Goth dating scene. Sheldon uses chocolate as part of a behavior modification experiment on Penny. -
Season 3 Episode 2
Sheldon and Howard wager comic books over a cricket's species. Meanwhile, a less-than-perfect romantic night agonizes Leonard and Penny. -
Season 3 Episode 1
Sheldon flees back to Texas in disgrace when he learns the guys tampered with his arctic expedition data, forcing the guys to follow him and threatening Leonard's hopes for a romantic encounter with Penny. -
Season 2 Episode 23
Leonard and Penny come to terms with their feelings for each other, as Leonard prepares himself for a three-month long science trip. -
Season 2 Episode 22
Things begin to look up for Leonard when Penny makes a surprising revelation on her second date with Stuart. Meanwhile, Wolowitz enlists his friends' help when he discovers a critical design flaw in his project for NASA.... -
Season 2 Episode 21
Leonard and Koothrappali take a heartbroken Wolowitz to Las Vegas, leaving Sheldon locked out of his apartment and forced to bunk with Penny. -
Season 2 Episode 20
A fellow comic book enthusiast's hitting on Penny leads to Leonard and Howard going to a bar's Ladies' Night. -
Season 2 Episode 19
Penny feels threatened when another sexy woman moves into the apartment building. -
Season 2 Episode 18
Penny's business selling hair products out of her apartment gets out of hand when an over-caffeinated Sheldon takes charge. -
Season 2 Episode 17
The gang is thrilled when they learn Terminator: The Sarah Connor Chronicles' Summer Glau is also aboard their train to San Francisco. -
Season 2 Episode 16
Paintball leads to a squabble between Sheldon and Penny, as well as romance between Howard and Leslie. -
Season 2 Episode 15
Leonard suffers through a dreadful visit from his mother (Christine Baranski) that ends up bringing him and Penny closer. -
Season 2 Episode 14
Sheldon helps Penny with a financial crisis, but his solution leads to a confrontation between Leonard and Penny's burly ex-boyfriend Kurt (Brian Patrick Wade). -
Season 2 Episode 13
Sheldon creates a scientific procedure for making friends. -
Season 2 Episode 12
Penny's criticism of Wolowitz's romantic life pushes him into depression and AWOL for a fighting robot battle the rest of guys are depending on him for. -
Season 2 Episode 11
Penny informs Sheldon that she intends to give gifts to him and Leonard on Christmas which happens to be around the corner. After considerable debate with Penny, Sheldon agrees to also give a gift to Penny on Christmas. -
Season 2 Episode 10
Leonard's relationship with Stephanie is moving too fast for him, so he runs to Penny for advice. -
Season 2 Episode 9
Sheldon is overexuberant that Leonard finally has a girlfriend matching his high standards. -
Season 2 Episode 8
A girl Wolowitz has a major crush on falls for Leonard. -
Season 2 Episode 7
When Sheldon bans Penny from the apartment for numerous minor infractions, she decides to retaliate. -
Season 2 Episode 6
Sheldon, and his friends, are mystified when a younger grad student is attracted to him. -
Season 2 Episode 5
An intervention is used to try to force Sheldon to overcome his fear of driving. -
Season 2 Episode 4
Full of confidence following getting a paper published, Raj hits on Penny. -
Season 2 Episode 3
Sheldon creates a monster when he introduces Penny to online gaming. -
Season 2 Episode 2
Leonard begins dating Sheldon’s nemesis, Leslie Winkle, after seeing Penny with a handsome new guy. -
Season 2 Episode 1
Penny opens up to a reluctant Sheldon after a less-than-stellar first date with Leonard. -
Season 1 Episode 17
Leonard comforts Penny after she breaks up with her boyfriend, again. After asking her out on a date they each turn to Sheldon for advice. Also, Howard teaches Sheldon Mandarin so he can complain about his not-so-tanger... -
Season 1 Episode 16
After finding out Leonard has never had a birthday party Penny decides to throw one for him (and forces Sheldon to join her). Unfortunately things do not go as planned and Wolowitz ends up in the emergency room. -
Season 1 Episode 15
When Sheldon's attractive twin sister Missy comes to visit the guys fight over her. Sheldon ends up trying to be protective of her, much to her displeasure. -
Season 1 Episode 14
Leonard buys a replica time machine online. As the boys move it into the apartment they accidentally make Penny late for work causing her to lash out at Leonard for his nerdy ways. Upset, Leonard decides to get rid of al... -
Season 1 Episode 13
The guys decided to compete in a physics bowl but find Sheldon's showboating too much and kick him off the team. Upset, Sheldon forms his own team to compete against them. -
Season 1 Episode 12
Sheldon and Leonard look for a way to derail a 15-year-old physics prodigy's research. -
Season 1 Episode 11
When Sheldon gets sick, Leonard and the boys know what's in store and avoid him like the plague, leaving an unsuspecting Penny to nurse the world's worst patient back to health. -
Season 1 Episode 10
After hearing Penny sing, Leonard lies to avoid seeing her perform, but Sheldon takes it one step further with a more elaborate lie that leads to the appearance of his non-existent cousin. -
Season 1 Episode 9
When Sheldon and Leonard are invited to present their joint findings at a physics conference, Sheldon refuses. But when Penny steps in to mediate, it only deepens the rift between the two best friends. -
Season 1 Episode 8
Koothrappali's parents want him to go out with another Indian woman with the hopes of initiating a pre-arranged marriage. But his date turns out to have more in common with Sheldon. -
Season 1 Episode 7
When Wolowitz hooks up with Penny's old friend, it ruins "Halo Night" for the rest of the guys. -
Season 1 Episode 6
The guys are invited to Penny's Halloween costume party. During the party, Leonard has a run-in with Penny's ex-boyfriend. -
Season 1 Episode 5
Leonard and his colleague Leslie spend the night together. But Leslie tells Leonard after the fact that she's only interested in a one-night stand. -
Season 1 Episode 4
Sheldon's mother visits to get him out of the funk he's in after he is fired for disrespecting his new boss. -
Season 1 Episode 3
Leonard gets upset when he discovers that Penny is seeing a new guy, so he tries to trick her into going on a "date" with him. -
Season 1 Episode 2
Penny is furious and more than a little freaked out with Leonard and Sheldon when they sneak into her apartment overnight, and clean it while she is sleeping. -
Season 1 Episode 1
A pair of brilliant theoretical physicists meet a woman who shows them how little they know about the real world.

