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This season the Big Bang gang’s romantic universe expands. On the rebound from Penny, Leonard falls into the arms of Raj’s sister Priya. Sheldon gets a girlfriend, or rather a friend who is a girl: Amy, a dour neurobiologist who declares herself besties with Penny. Howard and Bernadette heat up. And so do Raj and Bernadette (at least in Raj’s Bollywood daydream).
Afleveringen
1The Robotic Manipulation23 sep 2010 · 21mPenny tags along on Sheldon's first ever date; Wolowitz finds a new use for a robotic arm.
2The Cruciferous Vegetable Amplification30 sep 2010 · 21mRealizing he will not live long enough to download his consciousness into a robot body, Sheldon tries to extend his life span.
3The Zazzy Substitution7 okt 2010 · 21mThe guys are concerned as Sheldon searches for an alternative to human companionship.
4The Hot Troll Deviation14 okt 2010 · 20mAn embarrassing secret of Wolowitz's comes to light, while Sheldon and Raj have a small war at work.
5The Desperation Emanation21 okt 2010 · 21mLeonard realizes he’s the only one without a girlfriend, while Sheldon wants to get rid of his.
6The Irish Pub Formulation28 okt 2010 · 22mLeonard keeps an affair a secret from Sheldon, Howard and Raj.
7The Apology Insufficiency4 nov 2010 · 21mSheldon's answers during an FBI interview put Wolowitz's security clearance in jeopardy.
8The 21-Second Excitation11 nov 2010 · 19mWhile the guys camp in line for a long-awaited movie screening, Penny and Bernadette invite Amy to her first slumber party.
9The Boyfriend Complexity18 nov 2010 · 21mPenny asks Leonard to lie to her father, while Howard, Raj and Bernadette pull an all-nighter at a telescope.
10The Alien Parasite Hypothesis9 dec 2010 · 20mAmy finds she has sexual feelings for Penny's ex, while Koothrappali and Wolowitz try to prove who would be the better superhero.
11The Justice League Recombination16 dec 2010 · 20mThe guys find a "super" use for Penny's new boyfriend, Zack, when they enter a costume contest as the Justice League.
12The Bus Pants Utilization6 jan 2011 · 21mLeonard's idea for a smartphone app derails his friendship with Sheldon.
13The Love Car Displacement20 jan 2011 · 21mBernadette runs into her ex-boyfriend while attending a science event with Wolowitz.
14The Thespian Catalyst3 feb 2011 · 21mHoping it will make him a better teacher, Sheldon has Penny give him acting lessons. Raj has fantasies about a friend's girlfriend.
15The Benefactor Factor10 feb 2011 · 20mA wealthy donor to the university makes Leonard consider how far he's willing to go for the sake of science.
16The Cohabitation Formulation17 feb 2011 · 20mAs Wolowitz contemplates taking things with Bernadette to the next level, Leonard rekindles his relationship with Raj's sister.
17The Toast Derivation24 feb 2011 · 21mSheldon becomes concerned when everybody begins to hang out at Raj's apartment and discovers Leonard is the center of the group.
18The Prestidigitation Approximation10 mrt 2011 · 21mSheldon is baffled by Wolowitz's magic trick. Meanwhile, Leonard realizes dating Priya may make it impossible to continue being friends with Penny.
19The Zarnecki Incursion31 mrt 2011 · 21mSheldon's online-game account is hacked by Todd Zarnecki, who then proceeds to steal all his items prompting the guys to go on a quest to retrieve them. Penny, Bernadette and Amy discuss how Penny groomed Leonard to be willing to try various things and more adventurous boyfriend... for some other woman — Priya.
20The Herb Garden Germination7 apr 2011 · 21mSheldon and Amy decide to start several rumors about the others as a test. Meanwhile, Howard takes his relationship with Bernadette to even higher level.
21The Agreement Dissection28 apr 2011 · 21mWhen 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.
22The Wildebeest Implementation5 mei 2011 · 21mRaj attempts to cure his social anxiety disorder while Penny uses Bernadette to spy on Leonard and his girlfriend.
23The Engagement Reaction12 mei 2011 · 20mWhen Howard finally breaks the news to his mom that he's engaged to Bernadette, it lands her in the hospital.
24The Roommate Transmogrification19 mei 2011 · 21mWhen Bernadette receives her PhD, Wolowitz feels emasculated. Raj and Leonard swap places and Penny does something she's regrets.