University physicists Leonard and Sheldon know whether to use an integral or a differential to solve the area under a curve. But they don't have a clue about girls. Or dating. Or clothes. Or parties. Or having fun. Or, basically, life. So when a pretty blonde named Penny moves in the apartment across the hall, the guys decide to get an education outside of the classroom. Boys, you have a lot to learn.

Season 1 Episode 1 - Pilot

Brilliant physicist roommates Leonard and Sheldon meet their new neighbor Penny, who begins showing them that as much as they know about science, they know little about actual living. Air Date : 24th-Sep-2007  Read More

Season 1 Episode 2 - The Big Bran Hypothesis

Leonard volunteers to sign for a package in an attempt to make a good impression on Penny, but when he enlists Sheldon for help, his attempt at chivalry goes terribly awry. Air Date : 1st-Oct-2007  Read More

Season 1 Episode 3 - The Fuzzy Boots Corollary

Leonard asks a woman out after he finds out that Penny is seeing someone. Air Date : 8th-Oct-2007  Read More

Season 1 Episode 4 - The Luminous Fish Effect

Sheldon's getting fired forces him to explore what life has to offer outside physics, leaving Leonard to take drastic action to snap his friend out of his funk. Air Date : 15th-Oct-2007  Read More

Season 1 Episode 5 - The Hamburger Postulate

Fearing he's wasting his time on Penny, Leonard ends up making a connection with Leslie. Air Date : 22nd-Oct-2007  Read More

Season 1 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. Air Date : 29th-Oct-2007  Read More

Season 1 Episode 7 - The Dumpling Paradox

With Wolowitz AWOL with one of her friends, Penny's recruited to fill in for him on the guys' Halo team Air Date : 5th-Nov-2007  Read More

Season 1 Episode 8 - The Grasshopper Experiment

Raj's parents set him up on a blind date, but just when he discovers he can talk to her, she shows interest in Sheldon. Air Date : 12th-Nov-2007  Read More

Season 1 Episode 9 - The Cooper-Hofstadter Polarization

When they're invited to present at a physics conference, Sheldon's reluctance to share the credit leads to a tiff between him and Leonard, and Penny's intervention only exacerbates the situation. Air Date : 17th-Mar-2008  Read More

Season 1 Episode 10 - The Loobenfeld Decay

Leonard and Sheldon each lie to avoid seeing Penny's concert, but Sheldon's is a bit too complicated for his own good. Air Date : 24th-Mar-2008  Read More

Season 1 Episode 11 - The Pancake Batter Anomaly

With his friends knowing how sour he acts when sick—and avoiding him as a result—Sheldon is nursed by Penny, who hasn't a clue what she's in for. Air Date : 31st-Mar-2008  Read More

Season 1 Episode 12 - The Jerusalem Duality

With Sheldon rattled over meeting Dennis, a 15-year-old physicist who's smarter than he, Leonard helps him look for a way to debunk Dennis's research. Air Date : 14th-Apr-2008  Read More

Season 1 Episode 13 - The Bat Jar Conjecture

Sheldon finds himself booted from the gang's Physics Bowl team and replaced with Leslie, so he forms his own team, hoping to prove he's superior. Air Date : 21st-Apr-2008  Read More

Season 1 Episode 14 - The Nerdvana Annihilation

When delivery of another collectible leads to Penny's lashing out at Leonard, he decides it's time to give up his habit, much to his friends' protestation. Air Date : 28th-Apr-2008  Read More

Season 1 Episode 15 - The Pork Chop Indeterminacy

The rest of the gang fall for Sheldon's twin sister, and Leonard's plan to win her heart is derailed when Sheldon declares he'll be the one to decide who can date her. Air Date : 5th-May-2008  Read More

Season 1 Episode 16 - The Peanut Reaction

Penny wants to throw a surprise party for Leonard, but Sheldon's indulgence at an electronics store throws her off-track. Air Date : 12th-May-2008  Read More

Season 1 Episode 17 - The Tangerine Factor

Penny's break-up spurs Leonard to summon the courage to ask her out, and each goes to Sheldon for advice on their upcoming date. Air Date : 19th-May-2008  Read More