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Arch-nerds Leonard and Sheldon may know more than their fair share about subatomic particles, but when it comes to people in general, and women in particular, they're absolutely clueless...

About the Show

Arch-nerds Leonard and Sheldon may know more than their fair share about subatomic particles, but when it comes to people in general, and women in particular, they're absolutely clueless...

Series 1 Summary

Leonard and Sheldon's geeky world is rocked to its core when the gorgeous Penny moves in across the hall. Leonard takes an immediate shine to her, while Sheldon is more sceptical, but what will this 'cheesecake scented goddess' make of them?

  • Big Bang Theory

    Episode 1 - Pilot

    Sheldon and Leonard are two of the most intelligent people you could wish to meet - but unless you're into quantum physics it's unlikely you'd wish to meet 'em... However, their geeky world is soon shaken up by the arrival of a new neighbour, the delectable Penny.

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    Episode 2 - The Big Bran Hypothesis

    Penny leaves Sheldon and Leonard the spare keys to let the furniture guy in, but when Sheldon sees the untidy state of her apartment he can't stop his compulsive need to organise the world around him...

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    Episode 3 - The Fuzzyboots Corollary

    Leonard can't stop thinking about Penny when he catches her snogging the face off a new squeeze, so he decides his best course of action is to date one of his lab mates. When the date turns out to be more physics and chemistry than physical chemistry, Leonard reverts to Plan A...

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    Episode 4 - The Luminous Fish Effect

    Mum's the word in this episode of The Big Bang Theory. Never one to mince his words, Sheldon doesn't make a good impression on the new department head. In fact, he gets the sack... As an unemployed Sheldon gets increasingly depressed, Leonard grows concerned for his roommate and calls the only person he knows who can sort out the fragile physicist - Sheldon's mother.

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    Episode 5 - The Hamburger Postulate

    Leonard fears that he's wasting his time on Penny, so he ends up making a connection with Leslie. Meanwhile, Sheldon frets over a change to his hamburger routine.

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    Episode 6 - The Middle Earth Paradigm

    Penny hosts a Halloween party, putting Leonard, Sheldon, Wolowitz, and Koothrappali through a new test of their social skills. Perhaps unsurprisingly, they fail it miserably...

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    Episode 7 - The Dumpling Paradox

    When Wolowitz seduces Penny's friend in her apartment, Penny is forced to sleep on Leonard and Sheldon's couch. The boys are furious. Not only has Wolowitz transgressed the first law of the gang by being successul with a woman, he's put their Halo game in jeopardy!

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    Episode 8 - The Grasshopper Experiment

    Raj, the man who can't speak to women, panics when his parents set him up for a blind date. However, he discovers that if he consumes enough alcohol his shyness around the opposite sex suddenly evaporates. Along with his dignity...

  • Leonard

    Episode 9 - The Cooper-Hofstadter Polarization

    The prestigious Institute for Experimental Physics invites the boys to present their findings at a conference. Sheldon refuses and expects Leonard to do the same but, to Sheldon's horror, he does not...

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    Episode 10 - The Loobenfeld Decay

    Having overheard Penny sing, Leonard and Sheldon go to extreme lengths to avoid watching her perform in a musical. One lie leads to another, though, and the next thing you know, you're attending a drug intervention...

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    Episode 11 - The Pancake Batter Anomaly

    Penny is back from Nebraska, but unfortunately for 'germophobic' Sheldon the only present she's brought back is a nasty flu bug, which she thoughtlessly releases into the atmosphere. Despite taking comprehensive preventative measures, including cultivating his own antibodies in a base of green jelly, Sheldon seems doomed to succumb to the evil virus...

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    Episode 12 - The Jerusalem Duality

    When Sheldon meets Dennis, a 15-year-old physicist who is clearly much brighter than he is, his confidence is badly shaken. It falls upon Leonard, Wolowitz and Raj to get Sheldon back to his old self, which inevitably means bringing about Dennis' downfall...

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    Episode 13 - The Bat Jar Conjecture

    Excitement abounds when Raj, Leonard, Howard and Sheldon discover their main opponents for the annual Physics Bowl quiz are not entering a team this year, leaving them with a fighting chance. But when a disgruntled Sheldon is ousted from the squad, he decides to prove his superiority by forming his own team for the event.

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    Episode 14 - The Nerdvana Annihilation

    Leonard buys a replica time machine online - which works in reverse when it makes Penny late for work. After Penny lashes out at him over his collection of geeky memorabilia, he decides it's time to give up this guilty pleasure. But Leonard's friends put up a fierce fight to keep him on the side of the nerds...

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    Episode 15 - The Shiska Indeterminacy

    Sheldon's twin sister Missy is in town and, bizarrely, she's a stunner! Leonard, Howard and Raj compete for her attention, but then Sheldon declares he will decide who dates his sister...

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    Episode 16 - The Peanut Reaction

    Leonard's birthday causes all sorts of madness. Sheldon moonlights as a shop assistant, Howard has an unexpected colonoscopy and a drunken Raj ends up singing 'True Colours'. Who said geeks don't know how to have fun?

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    Episode 17 - The Tangerine Factor

    A saucy blog is the straw that breaks the camel's back for Penny's latest relationship - cue an advance from a smitten Leonard. Sheldon's got more pressing matters on his mind, though. He's intent on discovering whether the local Chinese restaurant is passing off orange chicken as tangerine chicken...

The Big Bang Theory synopsis

Arch-nerds Leonard and Sheldon may know more than their fair share about subatomic particles, but when it comes to people in general, and women in particular, they're absolutely clueless...

Episode Guide >

Next on TV

The Bat Jar Conjecture

Excitement abounds when Raj, Leonard, Howard and Sheldon discover their main opponents for the annual Physics Bowl quiz are not entering a team this year…

E4 11pm Tue 23 Sept