- 0 Craig Ferguson Hosts The Cast Of Big Bang Theory
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Tonight, it’s a special Big Bang Theory edition of The Late Late Show with Craig Ferguson. The cast will pretty much take over the show, including comedy sketches. Meanwhile, Craig auditions to become a new friend to Sheldon and Leonard.
Air Date: 2010-09-22
- 1 The Robotic Manipulation
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Penny tags along on Sheldon's first ever date; Wolowitz finds a new use for a robotic arm.
Average Episode Rating: 4.1 | Air Date: 2010-09-23
- 2 The Cruciferous Vegetable Amplification
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Realizing he will not live long enough to download his consciousness into a robot body, Sheldon tries to extend his life span.
Average Episode Rating: 4.3 | Air Date: 2010-09-30
- 3 The Zazzy Substitution
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The guys are concerned as Sheldon searches for an alternative to human companionship.
Average Episode Rating: 4.1 | Air Date: 2010-10-07
- 4 The Hot Troll Deviation
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An embarrassing secret of Wolowitz's comes to light, while Sheldon and Raj have a small war at work.
Average Episode Rating: 4.3 | Air Date: 2010-10-14
- 5 The Desperation Emanation
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Leonard realizes he’s the only one without a girlfriend, while Sheldon wants to get rid of his.
Average Episode Rating: 4.0 | Air Date: 2010-10-21
- 6 The Irish Pub Formulation
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Leonard keeps an affair a secret from Sheldon, Howard and Raj.
Average Episode Rating: 4.2 | Air Date: 2010-10-28
- 7 The Apology Insufficiency
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Sheldon's answers during an FBI interview put Wolowitz's security clearance in jeopardy.
Average Episode Rating: 4.5 | Air Date: 2010-11-04
- 8 The 21-Second Excitation
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While the guys camp in line for a long-awaited movie screening, Penny and Bernadette invite Amy to her first slumber party.
Average Episode Rating: 4.5 | Air Date: 2010-11-11
- 9 The Boyfriend Complexity
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Penny asks Leonard to lie to her father, while Howard, Raj and Bernadette pull an all-nighter at a telescope.
Average Episode Rating: 4.7 | Air Date: 2010-11-18
- 10 The Alien Parasite Hypothesis
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Amy finds she has sexual feelings for Penny's ex, while Koothrappali and Wolowitz try to prove who would be the better superhero.
Average Episode Rating: 4.5 | Air Date: 2010-12-09
- 11 The Justice League Recombination
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The guys find a "super" use for Penny's new boyfriend, Zack, when they enter a costume contest as the Justice League.
Average Episode Rating: 4.6 | Air Date: 2010-12-16
- 12 The Bus Pants Utilization
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Leonard's idea for a smartphone app derails his friendship with Sheldon.
Average Episode Rating: 3.9 | Air Date: 2011-01-06
- 13 The Love Car Displacement
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Bernadette runs into her ex-boyfriend while attending a science event with Wolowitz.
Average Episode Rating: 3.9 | Air Date: 2011-01-20
- 14 The Thespian Catalyst
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Hoping it will make him a better teacher, Sheldon has Penny give him acting lessons. Raj has fantasies about a friend's girlfriend.
Average Episode Rating: 4.0 | Air Date: 2011-02-03
- 15 The Benefactor Factor
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A wealthy donor to the university makes Leonard consider how far he's willing to go for the sake of science.
Average Episode Rating: 4.4 | Air Date: 2011-02-10
- 16 The Cohabitation Formulation
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As Wolowitz contemplates taking things with Bernadette to the next level, Leonard rekindles his relationship with Raj's sister.
Average Episode Rating: 4.6 | Air Date: 2011-02-17
- 17 The Toast Derivation
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Sheldon becomes concerned when everybody begins to hang out at Raj's apartment and discovers Leonard is the center of the group.
Average Episode Rating: 4.3 | Air Date: 2011-02-24
- 18 The Prestidigitation Approximation
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Sheldon is baffled by Wolowitz's magic trick. Meanwhile, Leonard realizes dating Priya may make it impossible to continue being friends with Penny.
Average Episode Rating: 4.4 | Air Date: 2011-03-10
- 19 The Zarnecki Incursion
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Sheldon's World of Warcraft online game account is hacked and he is determined to find out who did it. Also Penny shares some girl talk with her friends about Leonard and his new girlfriend. When Howard discovers who hacked the account, the guys depart for a quest to Carlsbad, California where the hacker, Todd Zarnecki, lives in order to retrieve the stolen account, along with "enchanted weapons, gladiator armor, gold, and a battle ostrich, Glenn". Despite Sheldon carrying his Bat'leth with him they fail miserably. On the way back their car engine breaks down, and they're saved by Penny, who came to drive them home and upon hearing about their failure promises to show them "How we finish quests in Nebraska" and forces Zarnecki to give up kicking him below waist.
Average Episode Rating: 4.2 | Air Date: 2011-03-31
- 20 The Herb Garden Germination
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Sheldon and Amy decide to start several rumors about the others as a test. Meanwhile, Howard takes his relationship with Bernadette to even higher level.
Average Episode Rating: 4.3 | Air Date: 2011-04-07
- 21 The Agreement Dissection
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When Leonard spends too much time in the shower with Priya, Sheldon charges Leonard with two violations of the roommate agreement. However, before he can get too far, Priya uses her skills as a lawyer to nullify the charges due to the agreement's vague wording, much to Sheldon's dismay. When the guys take advantage of Priya's skills in order to eat Greek food on pizza night, Sheldon goes to Penny, who invites him to a girls' night out with Amy and Bernadette, which Sheldon agrees to after Penny mentions that they may be talking trash about Priya. After the girls drink some cocktails, they decide to take Sheldon dancing, which Sheldon reluctantly goes along with. After dancing, Sheldon takes an intoxicated Amy back to her apartment and as well as talking about Priya, meets a monkey who is addicted to smoking cigarettes. Amy tells Sheldon not to give in to Priya's law skills, before kissing him and going to her bathroom to vomit.
Average Episode Rating: 4.0 | Air Date: 2011-04-28
- 22 The Wildebeest Implementation
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Raj attempts to cure his social anxiety disorder while Penny uses Bernadette to spy on Leonard and his girlfriend.
Average Episode Rating: 4.0 | Air Date: 2011-05-05
- 23 The Engagement Reaction
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When Howard finally breaks the news to his mom that he's engaged to Bernadette, it lands her in the hospital.
Average Episode Rating: 4.2 | Air Date: 2011-05-12
- 24 The Roommate Transmogrification
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When Bernadette receives her PhD, Wolowitz feels emasculated. Raj and Leonard swap places and Penny does something she's regrets.
Average Episode Rating: 4.7 | Air Date: 2011-05-19