Episode Guide

The Love Spell Potential

The Love Spell Potential

Season 6, Ep. 23

Amy and Sheldon's relationship takes a surprising turn during a game of "Dungeons & Dragons"; Lucy and Koothrappali have an awkward date.

Read more: Will Sheldon and Amy actually talk about that thing they've been avoiding?

Gallery: Love is in the air on 'BBT'

First Aired: May 9, 2013

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The Proton Resurgence

The Proton Resurgence

Season 9, Ep. 22

Leonard and Sheldon hire the host (Bob Newhart) of their favorite childhood TV show to perform; Bernadette and Howard run into trouble while dog-sitting for Raj's pet.

Read more: Sheldon meets his childhood idol on ‘Big Bang Theory’ but ends up riding with him to the hospital

First Aired: May 2, 2013

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The Closure Alternative

The Closure Alternative

Season 6, Ep. 21

Amy tries to help Sheldon get over his compulsive need for closure when one of his favorite TV shows is canceled; Raj discovers a secret about Lucy.

First Aired: April 25, 2013

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The Tenure Turbulence

The Tenure Turbulence

Season 6, Ep. 20

The girls get involved when Leonard, Sheldon and Raj compete for tenure at the University.

First Aired: April 4, 2013

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The Closet Reconfiguration

The Closet Reconfiguration

Season 6, Ep. 19

Howard considers whether or not he should open a letter from his father; Penny and Leonard host a "grown-up" cocktail party.

Read more: You’re invited to a 'Big Bang Theory' dinner party

Read even more: Cast celebrates success of past 4 years, but withholds spoilers

First Aired: March 14, 2013

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The Contractual Obligation Implementation

The Contractual Obligation Implementation

Season 6, Ep. 18

Leonard, Sheldon and Wolowitz talk to junior high girls about science-related careers; Raj plans a date with Lucy.

Read more: The guys head back to junior high, while Raj tries to sweep Lucy off her feet

Gallery: Forget the lab or the couch, the cast of 'BBT' hits the red carpet

First aired on March 7, 2013.

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The Monster Isolation

The Monster Isolation

Season 6, Ep. 17

Raj is put out when his date walks out in the middle of their evening, so he vows that he will forever stay put in his apartment. Meanwhile, Sheldon is quite impressed when he witnesses Penny's acting skills firsthand.

Read more: Love was in the air...but maybe not for Raj

First aired on February 21, 2013.

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The Tangible Affection Proof

The Tangible Affection Proof

Season 6, Ep. 16

The guys search for a perfect Valentine's Day gift for their significant others; Stuart and Raj host a "lonely people" party at the comic book store.

Read more: Valentine's Day on 'BBT'

First aired on February 14, 2013.

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The Spoiler Alert Segmentation

The Spoiler Alert Segmentation

Season 6, Ep. 15

A fight between Sheldon and Leonard impacts Amy and Penny's living arrangements; while Howard is away, Raj helps Mrs. Wolowitz out.

Read more: Moving in and shacking up on 'BBT'?

First aired on February 7, 2013.

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The Cooper/Kripke Inversion

The Cooper/Kripke Inversion

Season 6, Ep. 14

Sheldon faces a crisis of confidence when he is forced to work with his nemesis, Barry Kripke; Raj and Howard buy expensive action figures of themselves.

Read: My 88-year-old 'Meemaw's' love of 'Big Bang Theory'

First aired on January 31, 2013.

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The Bakersfield Expedition

The Bakersfield Expedition

Season 6, Ep. 13

As the guys don costumes and go on a road trip to a comic book convention, the ladies decide to stay home and try to interpret a comic book.

First aired on January 10, 2013

The Egg Salad Equivalency

The Egg Salad Equivalency

Season 6, Ep. 12

When Sheldon is accused of sexual harassment, he ends up getting Raj, Leonard and Wolowitz in trouble.

First aired on January 3, 2013.

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The Santa Simulation

The Santa Simulation

Season 6, Ep. 11

Sheldon has issues with Santa Claus on Christmas.

First aired on December 13, 2012.

The Fish Guts Displacement

The Fish Guts Displacement

Season 6, Ep. 10

Amy takes ill and Sheldon becomes her nursemaid, while Wolowitz takes a fishing trip in order to bond with his father-in-law.

First aired December 5, 2012.

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The Parking Spot Escalation

The Parking Spot Escalation

Season 6, Ep. 9

Sheldon and Wolowitz's fight over a parking spot at the university impacts the whole gang.

First aired on November 29, 2012.


The 43 Peculiarity

The 43 Peculiarity

Season 6, Ep. 8

Raj and Howard try to figure out why Sheldon disappears at 2:45 every afternoon; jealousy arises in Penny and Leonard's relationship.

First aired on November 15, 2012.

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The Habitation Configuration

The Habitation Configuration

Season 6, Ep. 7

Bernadette wants Wolowitz to move out of his mom's house; Sheldon is caught in the middle of Amy and Wil Wheaton's argument.

First aired on November 8, 2012.

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The Extract Obliteration

The Extract Obliteration

Season 6, Ep. 6

A game threatens Sheldon's relationship with Stephen Hawking; Penny secretly signs up for a college class.

First aired on November 1, 2012.

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 The Holographic Excitation

The Holographic Excitation

Season 6, Ep. 5

The gang heads to Stuart's comic book store to celebrate Halloween; Leonard uses science to seduce Penny.

First aired on October 25, 2012.

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The Re-Entry Minimization

The Re-Entry Minimization

Season 6, Ep. 4

Wolowitz's return from space isn't all he expected; game night becomes a gender war.

First aired on October 18, 2012.

The Higgs Boson Observation

The Higgs Boson Observation

Season 6, Ep. 3

Amy feels threatened by Sheldon's new assistant; Wolowitz starts to feel the pressures of being in space

First aired on Oct. 11.

The Decoupling Fluctuation

The Decoupling Fluctuation

Season 6, Ep. 2

Sheldon tries to intervene when he learns that Penny is thinking about breaking up with Leonard; Howard is picked on.

First aired on Oct. 4.

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The Date Night Variable

The Date Night Variable

Season 6, Ep. 1

Raj faces his loneliness when his friends are out on dates; while in space, Wolowitz gets drawn into a fight between Bernadette and his mom.

First aired on Sept. 27.

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The Countdown Reflection

The Countdown Reflection

Season 5, Ep. 24

In the season finale, Howard and Bernadette decide to get married before his NASA mission, causing the gang to scurry into overdrive in an effort to stage the wedding.

Original Air Date: May 10, 2012

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The Launch Acceleration

The Launch Acceleration

Season 5, Ep. 23

NASA reschedules Howard's mission, putting the wedding plans in jeopardy. Meanwhile, Leonard says something surprising to Penny in the bedroom.

Original Air Date: May 3, 2012

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