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(2007– )

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Episode #9.1

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The Commitment Determination

As Sheldon presses Leonard and Penny to set a wedding date, he encounters major changes in his relationship with Amy. Meanwhile, Raj wonders if he should break up with Emily, and Howard and Bernadette struggle to ask ...
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Season 1

1 May 2006
Unaired Pilot
The first Pilot of what will become "The Big Bang Theory". Leonard and Sheldon are two awkward scientist who share an apartment. They meet a drunk girl called Katie and invite her to stay at their place, because she has nowhere to stay. The two guys have a female friend, also a scientist, called Gilda.
 
24 Sep. 2007
Pilot
A pair of socially awkward theoretical physicists meet their new neighbor Penny, who is their polar opposite.
 
1 Oct. 2007
The Big Bran Hypothesis
Penny is furious with Leonard and Sheldon when they sneak into her apartment and clean it while she is sleeping.
 
8 Oct. 2007
The Fuzzy Boots Corollary
Leonard gets upset when he discovers that Penny is seeing a new guy, so he tries to trick her into going on a date with him.
 
15 Oct. 2007
The Luminous Fish Effect
Sheldon's mother is called to intervene when he delves into numerous obsessions after being fired for being disrespectful to his new boss.
 
22 Oct. 2007
The Hamburger Postulate
Leslie seduces Leonard, but afterwards tells him that she is only interested in a one-night stand.
 
29 Oct. 2007
The Middle Earth Paradigm
The guys are invited to Penny's Halloween party, where Leonard has yet another run-in with Penny's ex-boyfriend Kurt.
 
5 Nov. 2007
The Dumpling Paradox
When Howard hooks up with Penny's old friend, his absence in the gang causes problems for the rest of the guys.
 
12 Nov. 2007
The Grasshopper Experiment
When Raj's parents set him up on a blind date, he finds he can talk to women with the aid of alcohol.
 
17 Mar. 2008
The Cooper-Hofstadter Polarization
Leonard and Sheldon's friendship is put to the test when Leonard wants to present a paper they co-authored at a physics convention, but Sheldon doesn't.
 
24 Mar. 2008
The Loobenfeld Decay
Leonard lies to Penny so that he and Sheldon can get out of watching her perform. However, Sheldon believes that the lie has too many loose ends, so he comes up with a new, unnecessarily complex one to replace it.
 
31 Mar. 2008
The Pancake Batter Anomaly
When Sheldon gets sick, Leonard, Howard and Raj go AWOL, leaving a reluctant Penny to deal with him.
 
14 Apr. 2008
The Jerusalem Duality
Sheldon decides to give up his work and focus on other tasks when a 15-year-old prodigy joins the lab, so the other guys come up with a plan to get rid of him.
 
21 Apr. 2008
The Bat Jar Conjecture
Sheldon becomes so intent on demonstrating his intellectual superiority over the other guys that they kick him off the Physics Bowl team and replace him with his nemesis, Leslie.
 
28 Apr. 2008
The Nerdvana Annihilation
Penny gets mad at the guys when their full scale model of a time machine causes her to miss work, which prompts Leonard to give up all of his nerd memorabilia.
 
5 May 2008
The Pork Chop Indeterminacy
Leonard, Howard and Raj fight over Sheldon's twin sister when she arrives in town. Raj takes part in a drug trial to suppress his selective mutism.
 
12 May 2008
The Peanut Reaction
When Penny learns that Leonard has never had a birthday party, she and the rest of the guys plan a surprise party for him.
 
19 May 2008
The Tangerine Factor
After a bad breakup, Penny finally agrees to go out on a date with Leonard, however they both develop doubts and turn to Sheldon for advice.
 

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Episode Cast | Rated Episodes (by date / vote)| TV Schedule

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