The Big Bang Theory
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. But what will this 'cheesecake scented goddess' make of them?
Episode 1 - Pilot
Leonard and Sheldon are brilliant physicists, but have no luck when it comes to understanding women. All this begins to change when the beautiful Penny moves in next door.
Episode 2 - The Big Bran Hypothesis
Sheldon is bothered by how messy Penny's flat is and he sneaks in to clean and organise it, but Penny isn't best pleased when she finds out
Episode 3 - The Fuzzyboots Corollary
Leonard is depressed when he discovers that Penny is seeing someone, and he actually summons up the courage to ask a woman out on a date
Episode 4 - The Luminous Fish Effect
Getting fired forces Sheldon to ponder life outside physics, leaving Leonard to take drastic action to snap his friend out of his reverie
Episode 5 - The Hamburger Postulate
Leonard worries that he's wasting his time on Penny, so he gets closer to Leslie. Meanwhile, Sheldon frets over a change to his hamburger routine.
Episode 6 - The Middle Earth Paradigm
Penny hosts a Halloween party, putting Leonard, Sheldon, Howard and Raj through a new test of their social skills. Perhaps unsurprisingly, they fail it miserably...
Episode 7 - The Dumpling Paradox
When Howard seduces Penny's friend and spends the night with her in Penny's flat, Penny asks if she can sleep on Leonard and Sheldon's sofa
Episode 8 - The Grasshopper Experiment
Raj panics when his parents arrange a blind date for him, but discovers that he actually can talk to women after a few drinks
Episode 9 - The Cooper-Hofstadter Polarization
Sheldon and Leonard are asked to present a paper at a physics conference, but Sheldon is reluctant to share the credit. Penny tries to help.
Episode 10 - The Loobenfeld Decay
Leonard and Sheldon each tell a lie to avoid going to see Penny on stage singing in a production of Rent, but Sheldon's lie gets out of control
Episode 11 - The Pancake Batter Anomaly
Penny volunteers to nurse Sheldon when he's sick. However, his friends know how miserable he is when he's ill and stay well away from him.
Episode 12 - The Jerusalem Duality
When Sheldon meets a 15-year-old physicist who is clearly much brighter than he is, his confidence is shaken to the core
Episode 13 - The Bat Jar Conjecture
Sheldon is ousted from the gang's Physics Bowl quiz team, so he decides to prove his superiority by forming his own team for the event
Episode 14 - The Nerdvana Annihilation
Penny makes fun of Leonard's habit of collecting goofy memorabilia, but his friends kick up a fuss and try to keep him on the side of the nerds
Episode 15 - The Shiksa 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...
Episode 16 - The Peanut Reaction
Penny wants to throw a surprise party for Leonard and gets support from Howard and Raj, but Sheldon's indulgence in an electronics shop throws her off track
Episode 17 - The Tangerine Factor
When Penny breaks up with her boyfriend, Leonard plucks up the courage to ask her out. Both of them then ask Sheldon for advice about the date.