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The Big Bang Theory Season 1 episodes

S01 E01
Pilot
22 mins · Mon, 24 Sep 2007
Two physicists learn how little they know about life when a beautiful woman comes into their lives. When Leonard and Sheldon meet Penny, Leonard is immediately interested in her, but Sheldon feels his friend is chasing a dream he'll never catch.

S01 E02
The Big Bran Hypothesis
21 mins · Mon, 1 Oct 2007
Sheldon and Leonard go to Penny's apartment to drop off a package, but Sheldon can't believe how messy her apartment is.

S01 E03
The Fuzzy Boots Corollary
22 mins · Mon, 8 Oct 2007
Leonard is depressed when he discovers that Penny is dating someone. As a result, and encouraged by his friends and fellow scientists, Leonard actually summons up the courage to ask a woman out on a date.

S01 E04
The Luminous Fish Effect
20 mins · Mon, 15 Oct 2007
Getting fired forces Sheldon to explore life outside physics, leaving Leonard to take drastic action to snap his friend out of his reverie.

S01 E05
The Hamburger Postulate
20 mins · Mon, 22 Oct 2007
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.

S01 E06
The Middle Earth Paradigm
21 mins · Mon, 29 Oct 2007
Penny hosts a Halloween party, putting Leonard, Sheldon, Wolowitz and Koothrappali through a new test of their social skills.

S01 E07
The Dumpling Paradox
21 mins · Mon, 5 Nov 2007
When Howard seduces Penny's friend and they spend the night together in Penny's flat, Penny asks to sleep on Leonard and Sheldon's sofa, so the guys ask her to fill in for Howard on one of their Halo teams.

S01 E08
The Grasshopper Experiment
20 mins · Mon, 12 Nov 2007
Koothrappali becomes overwhelmed with panic when his parents arrange a blind date for him, only to discover that he actually can talk to a member of the opposite sex after a few drinks.

S01 E09
The Cooper-Hofstadter Polarization
19 mins · Mon, 17 Mar 2008
When they're invited to give a presentation at a physics conference, Sheldon's reluctance to share the credit leads to a tiff between he and Leonard, and Penny's intervention only exacerbates the situation.

S01 E10
The Loobenfeld Decay
20 mins · Mon, 24 Mar 2008
Leonard and Sheldon each tell a lie to avoid going to see Penny on stage singing in a production of Rent. However, Sheldon's lie grows out of control, becoming too complicated for its own good.

S01 E11
The Pancake Batter Anomaly
22 mins · Mon, 31 Mar 2008
Without having a clue what she has let herself in for, 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.

S01 E12
The Jerusalem Duality
20 mins · Mon, 14 Apr 2008
When Sheldon meets Dennis, a 15-year-old physicist who is clearly much brighter than he is, his confidence is so badly shaken that Leonard agrees to help him discredit the precocious teenager's research.

S01 E13
The Bat Jar Conjecture
21 mins · Mon, 21 Apr 2008
Sheldon is ousted from the gang's bowling squad, so he decides to prove his superiority by forming his own team.

S01 E14
The Nerdvana Annihilation
20 mins · Mon, 28 Apr 2008
When Penny makes fun of Leonard's habit of collecting goofy memorabilia, he decides that it's time to give up his guilty pleasure, but Leonard's friends kick up a fuss and try to keep Leonard on the side of the nerds.

S01 E15
The Shiksa Indeterminacy
21 mins · Mon, 5 May 2008
The rest of the gang fall for Sheldon's twin sister, however, Leonard's plan to win her heart is derailed when Sheldon declares that he'll be the one to decide who can date her.

S01 E16
The Peanut Reaction
19 mins · Mon, 12 May 2008
Penny wants to throw a surprise party for Leonard, but Sheldon's indulgence at an electronics store throws her off-track.

S01 E17
The Tangerine Factor
20 mins · Mon, 19 May 2008
Penny's break-up spurs Leonard to summon the courage to ask her out. Before the big night, each of them go to Sheldon for advice on what could a make or break the date.
