Astronomically popular US sitcom. Nerdy flatmates Leonard and Sheldon know a lot about physics, but little about women. But when Penny moves in across the hall, that could all be about to change...
Leonard and Sheldon's geeky world is rocked to its core when the gorgeous Penny moves in across the hall. Unlike Sheldon, Leonard takes an immediate shine to her. But what will she make of them?
Series 1 Episode 1
Pilot: Leonard and Sheldon's geeky world is shaken up by the arrival of a new neighbour
Series 1 Episode 1
Series 1 Episode 2
The Big Bran Hypothesis: Sheldon sneaks into Penny's apartment to tidy it, but she's not pleased
Series 1 Episode 2
Series 1 Episode 3
The Fuzzyboots Corollary: Leonard summons up the courage to ask a woman out on a date
Series 1 Episode 3
Series 1 Episode 4
The Luminous Fish Effect: Getting fired leaves Sheldon pondering life beyond physics
Series 1 Episode 4
Series 1 Episode 5
The Hamburger Postulate: Sheldon is uncomfortable with a change to his hamburger routine
Series 1 Episode 5
Series 1 Episode 6
The Middle Earth Paradigm: Penny's Halloween party puts the gang's social skills to the test
Series 1 Episode 6
Series 1 Episode 7
The Dumpling Paradox: Penny needs somewhere to sleep when Howard spends the night in her flat with her friend
Series 1 Episode 7
Series 1 Episode 8
The Grasshopper Experiment: Raj discovers that he can talk to women when he's had a few drinks
Series 1 Episode 8
Series 1 Episode 9
The Cooper-Hofstadter Polarization: Sheldon's reluctance to share credit on joint work causes a rift between him and Leonard
Series 1 Episode 9
Series 1 Episode 10
The Loobenfeld Decay: Sheldon lies to get out of seeing Penny perform on stage. But one lie leads to another...
Series 1 Episode 10
Series 1 Episode 11
The Pancake Batter Anomaly: Penny makes the mistake of volunteering to look after Sheldon when he's sick
Series 1 Episode 11
Series 1 Episode 12
The Jerusalem Duality: Sheldon's shaken when he meets a teenage physicist who is clearly much brighter than he is
Series 1 Episode 12
Series 1 Episode 13
The Bat Jar Conjecture: Sheldon is ousted from the gang's Physics Bowl quiz team, so he forms a rival team
Series 1 Episode 13
Series 1 Episode 14
The Nerdvana Annihilation: Leonard considers giving up his habit of collecting memorabilia when Penny makes fun of it
Series 1 Episode 14
Series 1 Episode 15
The Shiksa Indeterminacy: Leonard, Howard and Raj compete for the attention of Sheldon's stunning twin sister
Series 1 Episode 15
Series 1 Episode 16
The Peanut Reaction: Penny plans a surprise party for Leonard, but things don't exactly go to plan
Series 1 Episode 16
Series 1 Episode 17
The Tangerine Factor: Penny's break-up spurs Leonard to summon the courage to ask her out
Series 1 Episode 17