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The Big Bang Theory Season 1

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123 votes
1x01 Pilot aired Sep 25, 2007

After an unsuccessful visit to the high-IQ sperm bank, Leonard (Johnny Galecki) and Sheldon (Jim Parsons) return home to find out Penny (Kaley Cuoco), a new ... read more

The Big Bran Hypothesis
93 votes
1x02 The Big Bran Hypothesis aired Oct 02, 2007

A Superman movie marathon is disrupted when Penny asks the guys to sign for a package that may be delivered while she’s gone. But when the guys discover that... read more

The Fuzzy Boots Corollary
89 votes
1x03 The Fuzzy Boots Corollary aired Oct 09, 2007

The guys are playing a computer game, but are interrupted when they hear Penny laughing across the hall. But Leonard is in for a shocking discovery when he s... read more

The Luminous Fish Effect
87 votes
1x04 The Luminous Fish Effect aired Oct 16, 2007

When Sheldon gets fired, he tries to explore life like everyone else sees it. He goes food shopping with Penny, although she is less than happy about it, and... read more

The Hamburger Postulate
77 votes
1x05 The Hamburger Postulate aired Oct 23, 2007

Playing with salt and pepper shakers at the Cheesecake Factory, the guys are forced to order or leave, and they decide to order. But Sheldon hasn’t eaten at ... read more

The Middle Earth Paradigm
81 votes
1x06 The Middle Earth Paradigm aired Oct 30, 2007

Embarrassed after being defeated by a Bar Mitzvah party at paintball, the guys are surprised when Penny invites them to her upcoming Halloween & Costume part... read more

The Dumpling Paradox
76 votes
1x07 The Dumpling Paradox aired Nov 06, 2007

Penny asks the guys if she can spend the night in their apartment when a friend of her from Omaha is visiting. Apparently, her friend is a very bad person an... read more

The Grasshopper Experiment
78 votes
1x08 The Grasshopper Experiment aired Nov 13, 2007

Koothrappali is not happy when his parents inform him that they have set up a blind date with a girl he knew from his childhood years. Apparently, the girl b... read more

The Cooper-Hofstadter Polarization
74 votes
1x09 The Cooper-Hofstadter Polarization aired Mar 18, 2008

The guys are performing a new scientific experiment, that includes sending a message around the world from their computer and, without using the remote, cont... read more

The Loobenfeld Decay
78 votes
1x10 The Loobenfeld Decay aired Mar 25, 2008

In the middle of a discussion, Leonard and Sheldon hear Penny’s awful singing, and when they see her coming down the stairs, they try to escape unsuccessfull... read more

The Pancake Batter Anomaly
78 votes
1x11 The Pancake Batter Anomaly aired Apr 01, 2008

Leonard and Sheldon are playing 3D Chess, but Leonard loses once again. Luckily for him, the conversation is disrupted when Penny comes home from her visit i... read more

The Jerusalem Duality
75 votes
1x12 The Jerusalem Duality aired Apr 15, 2008

While having lunch at the lab’s cafeteria, Leonard and Sheldon are introduced to a 15-year-old boy prodigy who happens to be equally as smart as or even smar... read more

The Bat Jar Conjecture
76 votes
1x13 The Bat Jar Conjecture aired Apr 22, 2008

Howard receives a mail on his cell phone saying that there is an open spot for a team at a Physics Bowl event coming up and the guys grab the opportunity. Bu... read more

The Nerdvana Annihilation
75 votes
1x14 The Nerdvana Annihilation aired Apr 29, 2008

Leonard is bidding in an auction for a miniature time machine, but wasn’t expecting to actually get it. When he does so and it is delivered, the guys are sho... read more

The Pork Chop Indeterminacy
79 votes
1x15 The Pork Chop Indeterminacy aired May 06, 2008

Sheldon gets a visit from his twin sister, Missy, who seems to be a much more interesting person that Sheldon believes she is. Leonard, Howard and Rajesh all... read more

The Peanut Reaction
79 votes
1x16 The Peanut Reaction aired May 13, 2008

Finding out that Leonard has never had a birthday party thrown for him, Penny convinces the guys to create a surprise party. Howard and Raj are in on the ide... read more

The Tangerine Factor
80 votes
1x17 The Tangerine Factor aired May 20, 2008

When Penny breaks up with her boyfriend after she finds out he has been posting about their sex life on his blog, Leonard gets enough courage to ask her out ... read more


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