The Big Bang Theory

The Big Bang Theory - CBS

CBS

Series

2007

TVPG

Sitcom

A group of socially awkward scientists and their free-spirited actress neighbor experience humorous situations as they explore friendships, relationships, and scientific endeavors.

Where to Stream

2007–2019 Series 12 Seasons290 Episodes

Upcoming TV Airings

The airings below are based on a generic national schedule. Times and dates can vary by TV provider.

Sunday, June 29

The Romance Recalibration

Season 10 • Episode 13

Penny and Amy go on a spa weekend; Wolowitz and Koothrappali try to fix a squeaky floorboard.

Sunday, June 29

The Emotion Detection Automation

Season 10 • Episode 14

Sheldon tests an MIT invention after hearing it can help him read people's emotions.

Sunday, June 29

The Locomotion Reverberation

Season 10 • Episode 15

Leonard and Wolowitz try to distract Sheldon when he slows the progress of their guidance system.

Sunday, June 29

The Allowance Evaporation

Season 10 • Episode 16

Sheldon and Amy have a fight; Koothrappali stops receiving financial support from his father.

Sunday, June 29

The Comic-Con Conundrum

Season 10 • Episode 17

Koothrappali asks Sheldon to help him get out of debt; Penny considers joining Leonard at Comic-Con.

Sunday, June 29

The Locomotion Interruption

Season 8 • Episode 1

Leonard and Amy make an unexpected trip to Arizona to fetch Sheldon; Penny goes for an interview.

Sunday, June 29

The Junior Professor Solution

Season 8 • Episode 2

Amy takes advantage of the tension between Penny and Bernadette.

Sunday, June 29

The First Pitch Insufficiency

Season 8 • Episode 3

Wolowitz feels nervous when he is asked to throw the first pitch at a Los Angeles Angels game.

Sunday, June 29

The Hook-Up Reverberation

Season 8 • Episode 4

Raj's honesty comes back to haunt him when his new girlfriend is unfriendly to Penny.

Sunday, June 29

The Focus Attenuation

Season 8 • Episode 5

During their weekend in Las Vegas, Bernadette and Amy accuse Penny of being a buzz kill.

Sunday, June 29

The Expedition Approximation

Season 8 • Episode 6

Raj and Sheldon try to simulate a dark-matter research expedition; Penny and Leonard have a fight.

Sunday, June 29

The Misinterpretation Agitation

Season 8 • Episode 7

The guys try to help when Penny is faced with an awkward dilemma at work.

Sunday, June 29

The Prom Equivalency

Season 8 • Episode 8

Sheldon feels pressured to participate in traditions when the gang re-creates a high-school prom.

Sunday, June 29

The Septum Deviation

Season 8 • Episode 9

Leonard has minor surgery on his nose, causing Sheldon to overreact.

Sunday, June 29

The Champagne Reflection

Season 8 • Episode 10

Howard, Leonard and Raj look through their dead professor's research.

Sunday, June 29

The Clean Room Infiltration

Season 8 • Episode 11

Leonard and Wolowitz clash over a work emergency; Sheldon resents having to celebrate the holidays.

Sunday, June 29

The Space Probe Disintegration

Season 8 • Episode 12

The guys agree to do something the girls like; Leonard and Sheldon butt heads.

Sunday, June 29

The Terminator Decoupling

Season 2 • Episode 17

Leonard, Sheldon and Wolowitz are ecstatic to learn that a sci-fi actress is aboard their train.

Sunday, June 29

The Work Song Nanocluster

Season 2 • Episode 18

Penny's home business turns into a complete nightmare when Sheldon takes over.

Monday, June 30

The Escape Hatch Identification

Season 10 • Episode 18

Leonard and Penny offer Sheldon's old room to Raj after he moves out of his apartment.

Monday, June 30

The Collaboration Fluctuation

Season 10 • Episode 19

Leonard, Penny and Raj adjust to their new arrangement; Sheldon expresses interest in Amy's work.

Monday, June 30

The Tesla Recoil

Season 11 • Episode 8

Leonard and Wolowitz are furious to learn Sheldon worked with the military behind their backs.

Monday, June 30

The Bitcoin Entanglement

Season 11 • Episode 9

Sheldon tries to teach the guys a lesson after being cut out of a potentially valuable investment.

Monday, June 30

The Separation Agitation

Season 10 • Episode 21

Howard and Bernadette struggle to leave Halley in day care; Bert introduces his new girlfriend.

Monday, June 30

The Cognition Regeneration

Season 10 • Episode 22

Leonard has concerns when Penny considers accepting a job offer from Zack, her ex-boyfriend.

Monday, June 30

The Adhesive Duck Deficiency

Season 3 • Episode 8

Penny is forced to rely on Sheldon when she is injured while Howard, Leonard and Raj are away.

Monday, June 30

The Vengeance Formulation

Season 3 • Episode 9

After being humiliated on the radio, Sheldon vows to destroy Kripke.

Monday, June 30

The Gorilla Experiment

Season 3 • Episode 10

Sheldon tries to help Penny understand Leonard's work; Wolowitz gets jealous.

Monday, June 30

The Maternal Congruence

Season 3 • Episode 11

Leonard is horrified when his mother (Christine Baranski) visits.

Monday, June 30

The Psychic Vortex

Season 3 • Episode 12

Sheldon and Koothrappali attend a mixer; Leonard discovers that Penny believes in psychics.

Monday, June 30

The Bozeman Reaction

Season 3 • Episode 13

Leonard and Sheldon turn to their friends to create a state-of-the-art security system.

Monday, June 30

The Einstein Approximation

Season 3 • Episode 14

Sheldon tries to figure out the answer to a physics problem by working with Penny.

Monday, June 30

The Large Hadron Collision

Season 3 • Episode 15

Leonard must choose who to bring with him when he goes to see the Large Hadron Collider.

Monday, June 30

The Jiminy Conjecture

Season 3 • Episode 2

Penny and Leonard try to recover from an awkward hookup; Howard and Sheldon make a high-stakes bet.

Monday, June 30

The Infestation Hypothesis

Season 5 • Episode 2

Amy is caught in the middle when Penny and Sheldon argue over a pre-owned chair.

Monday, June 30

The Pirate Solution

Season 3 • Episode 4

Raj faces deportation if he doesn't find a job; Leonard and Penny deal with Howard as a third wheel.

Tuesday, July 1

The Gyroscopic Collapse

Season 10 • Episode 23

Leonard, Sheldon and Wolowitz get an unwelcome surprise after completing the Air Force project.

Tuesday, July 1

The Long Distance Dissonance

Season 10 • Episode 24

Sheldon's former admirer, Dr. Ramona Nowitzki, resurfaces while Amy is away at Princeton.

Tuesday, July 1

The Big Bran Hypothesis

Season 1 • Episode 2

Leonard volunteers to sign for a package, hoping to make a good impression on Penny.

Tuesday, July 1

The Retraction Reaction

Season 11 • Episode 2

Leonard's job is at stake after he gives an embarrassing radio interview; Amy and Bernadette bond.

Tuesday, July 1

The Relaxation Integration

Season 11 • Episode 3

As Sheldon stresses about picking a wedding date, Amy tells him he can be more easygoing.

Tuesday, July 1

The Pirate Solution

Season 3 • Episode 4

Raj faces deportation if he doesn't find a job; Leonard and Penny deal with Howard as a third wheel.

Tuesday, July 1

The Creepy Candy Coating Corollary

Season 3 • Episode 5

Sheldon seeks revenge on his nemesis; Wolowitz wants Penny to set him up with one of her friends.

Tuesday, July 1

The Cornhusker Vortex

Season 3 • Episode 6

Sheldon teaches Leonard about football; kite-fighting threatens Howard and Raj's friendship.

Tuesday, July 1

The Guitarist Amplification

Season 3 • Episode 7

Sheldon tries to make peace when Leonard and Penny get into an argument.

Tuesday, July 1

The Adhesive Duck Deficiency

Season 3 • Episode 8

Penny is forced to rely on Sheldon when she is injured while Howard, Leonard and Raj are away.

Tuesday, July 1

The Vengeance Formulation

Season 3 • Episode 9

After being humiliated on the radio, Sheldon vows to destroy Kripke.

Tuesday, July 1

The Gorilla Experiment

Season 3 • Episode 10

Sheldon tries to help Penny understand Leonard's work; Wolowitz gets jealous.

Tuesday, July 1

The Pulled Groin Extrapolation

Season 5 • Episode 3

Bernadette, Howard and Mrs. Wolowitz spend the weekend together.

Wednesday, July 2

The Explosion Implosion

Season 11 • Episode 4

Wolowitz and Sheldon bond over having disappointing fathers; Leonard's mother befriends Penny.

Wednesday, July 2

The Collaboration Contamination

Season 11 • Episode 5

Penny and Leonard learn a secret from an unlikely source about dealing with Sheldon.

Wednesday, July 2

The Cooper-Nowitzki Theorem

Season 2 • Episode 6

Sheldon and the gang are confused when a young grad student is attracted to him.

Wednesday, July 2

The Geology Methodology

Season 11 • Episode 7

Sheldon tries to keep his collaboration with Bert a secret; Penny and Bernadette coach Koothrappali.

Wednesday, July 2

The Tesla Recoil

Season 11 • Episode 8

Leonard and Wolowitz are furious to learn Sheldon worked with the military behind their backs.

Wednesday, July 2

The Maternal Congruence

Season 3 • Episode 11

Leonard is horrified when his mother (Christine Baranski) visits.

Wednesday, July 2

The Psychic Vortex

Season 3 • Episode 12

Sheldon and Koothrappali attend a mixer; Leonard discovers that Penny believes in psychics.

Wednesday, July 2

The Bozeman Reaction

Season 3 • Episode 13

Leonard and Sheldon turn to their friends to create a state-of-the-art security system.

Wednesday, July 2

The Einstein Approximation

Season 3 • Episode 14

Sheldon tries to figure out the answer to a physics problem by working with Penny.

Wednesday, July 2

The Large Hadron Collision

Season 3 • Episode 15

Leonard must choose who to bring with him when he goes to see the Large Hadron Collider.

Wednesday, July 2

The Excelsior Acquisition

Season 3 • Episode 16

Sheldon ends up in traffic court after getting a ticket because of Penny.

Wednesday, July 2

The Precious Fragmentation

Season 3 • Episode 17

A ring from "The Lord of the Rings" at a garage sale threatens to tear the guys apart.

Wednesday, July 2

The Wiggly Finger Catalyst

Season 5 • Episode 4

Raj wants a girlfriend, so Penny introduces him to a woman he can communicate with.

Thursday, July 3

The Bitcoin Entanglement

Season 11 • Episode 9

Sheldon tries to teach the guys a lesson after being cut out of a potentially valuable investment.

Thursday, July 3

The Confidence Erosion

Season 11 • Episode 10

Sheldon and Amy try to use math to eliminate wedding planning stress.

Thursday, July 3

The Bath Item Gift Hypothesis

Season 2 • Episode 11

Leonard and his friends are tortured by Sheldon's obsession with gift-giving etiquette.

Thursday, July 3

The Solo Oscillation

Season 11 • Episode 13

Sheldon kicks Amy out to work solo; Amy and Leonard bond during a series of science experiments.

Thursday, July 3

The Separation Triangulation

Season 11 • Episode 14

Koothrappali learns the woman he's dating has a very upset husband; Sheldon rents his old room.

Thursday, July 3

The Wheaton Recurrence

Season 3 • Episode 19

Penny and Leonard have a fight that threatens their relationship; Sheldon and Wil Wheaton face off.

Thursday, July 3

The Spaghetti Catalyst

Season 3 • Episode 20

Sheldon goes to extremes to keep Leonard and Penny happy when they stop speaking to each other.

Thursday, July 3

The Plimpton Stimulation

Season 3 • Episode 21

Sheldon invites a famous physicist to the apartment, and competes with Leonard for her attention.

Thursday, July 3

The Staircase Implementation

Season 3 • Episode 22

Leonard tells Penny about how he met Sheldon and what happened to the elevator.

Thursday, July 3

The Lunar Excitation

Season 3 • Episode 23

Raj and Howard set up an online dating profile for Sheldon and find the perfect woman.

Thursday, July 3

The Robotic Manipulation

Season 4 • Episode 1

Penny tags along on Sheldon's first date; Wolowitz finds a new use for a robotic arm.

Thursday, July 3

The Zazzy Substitution

Season 4 • Episode 3

When Sheldon searches for an alternative to human companionship, the guys become concerned.

Thursday, July 3

The Russian Rocket Reaction

Season 5 • Episode 5

Wil Wheaton invites Leonard and Sheldon to a party at his house; Howard receives an opportunity.

Thursday, July 3

The Desperation Emanation

Season 4 • Episode 5

Leonard realizes he is the only one in his group without a girlfriend.

Thursday, July 3

The Irish Pub Formulation

Season 4 • Episode 6

Leonard keeps an affair a secret from Sheldon, Howard and Raj.

Thursday, July 3

The Apology Insufficiency

Season 4 • Episode 7

Sheldon's interview with the FBI jeopardizes Wolowitz's security clearance.

Thursday, July 3

The 21-Second Excitation

Season 4 • Episode 8

The guys camp out for a movie screening; Penny and Bernadette invite Amy to her first slumber party.

Thursday, July 3

The Boyfriend Complexity

Season 4 • Episode 9

Penny asks Leonard to lie to her father; an all-nighter at a telescope.

Thursday, July 3

The Justice League Recombination

Season 4 • Episode 11

The guys try to bond with Penny's new boyfriend through a costume contest.

Friday, July 4

The Novelization Correlation

Season 11 • Episode 15

Sheldon petitions Wil Wheaton to appear on his show, but Wil offers a role to Amy instead.

Friday, July 4

The Neonatal Nomenclature

Season 11 • Episode 16

When Bernadette won't go into labor, her friends try different tactics to get things started.

Friday, July 4

The Cruciferous Vegetable Amplification

Season 4 • Episode 2

Sheldon realizes he will not live long enough to download his consciousness into a robot body.

Friday, July 4

The Gates Excitation

Season 11 • Episode 18

Penny gets the opportunity to host Bill Gates at work when his company wants to partner with hers.

Friday, July 4

The Tenant Disassociation

Season 11 • Episode 19

Leonard decides to run against Sheldon for president of the tenants association.

Friday, July 4

The Excelsior Acquisition

Season 3 • Episode 16

Sheldon ends up in traffic court after getting a ticket because of Penny.

Friday, July 4

The Precious Fragmentation

Season 3 • Episode 17

A ring from "The Lord of the Rings" at a garage sale threatens to tear the guys apart.

Friday, July 4

The Pants Alternative

Season 3 • Episode 18

Sheldon's stage fright stands between him and a coveted award.

Friday, July 4

The Wheaton Recurrence

Season 3 • Episode 19

Penny and Leonard have a fight that threatens their relationship; Sheldon and Wil Wheaton face off.

Friday, July 4

The Spaghetti Catalyst

Season 3 • Episode 20

Sheldon goes to extremes to keep Leonard and Penny happy when they stop speaking to each other.

Friday, July 4

The Plimpton Stimulation

Season 3 • Episode 21

Sheldon invites a famous physicist to the apartment, and competes with Leonard for her attention.

Friday, July 4

The Staircase Implementation

Season 3 • Episode 22

Leonard tells Penny about how he met Sheldon and what happened to the elevator.

Friday, July 4

The Lunar Excitation

Season 3 • Episode 23

Raj and Howard set up an online dating profile for Sheldon and find the perfect woman.

Friday, July 4

The Robotic Manipulation

Season 4 • Episode 1

Penny tags along on Sheldon's first date; Wolowitz finds a new use for a robotic arm.

Friday, July 4

The Cruciferous Vegetable Amplification

Season 4 • Episode 2

Sheldon realizes he will not live long enough to download his consciousness into a robot body.

Friday, July 4

The Zazzy Substitution

Season 4 • Episode 3

When Sheldon searches for an alternative to human companionship, the guys become concerned.

Friday, July 4

The Hot Troll Deviation

Season 4 • Episode 4

An embarrassing secret of Wolowitz's is revealed; Raj and Sheldon get into a war at work.

Friday, July 4

The Cruciferous Vegetable Amplification

Season 4 • Episode 2

Sheldon realizes he will not live long enough to download his consciousness into a robot body.

Friday, July 4

The Alien Parasite Hypothesis

Season 4 • Episode 10

Koothrappali and Wolowitz try to prove who would be a better superhero.

Friday, July 4

The Bus Pants Utilization

Season 4 • Episode 12

Leonard's idea for a smartphone application causes friction in his friendship with Sheldon.

Friday, July 4

The Rhinitis Revelation

Season 5 • Episode 6

Sheldon finds himself competing with the gang for his mother's attention when she visits.

Saturday, July 5

The Reclusive Potential

Season 11 • Episode 20

A brilliant but reclusive scientist invites Sheldon to his cabin in the middle of nowhere.

Saturday, July 5

The Comet Polarization

Season 11 • Episode 21

Friendships are threatened when Koothrappali takes credit for Penny's astronomical discovery.

Saturday, July 5

The Justice League Recombination

Season 4 • Episode 11

The guys try to bond with Penny's new boyfriend through a costume contest.

Saturday, July 5

The Sibling Realignment

Season 11 • Episode 23

Sheldon's mother won't attend his wedding unless he invites his brother.

Saturday, July 5

The Bow Tie Asymmetry

Season 11 • Episode 24

Amy's parents and Sheldon's family arrive; nearly everybody is focused on the wedding plans.

Saturday, July 5

The Anxiety Optimization

Season 8 • Episode 13

Sheldon asks his friends to challenge him in hope of achieving a scientific breakthrough.

Saturday, July 5

The Troll Manifestation

Season 8 • Episode 14

Sheldon and Leonard must defend themselves from an online bully's criticism after writing a paper.

Saturday, July 5

The Comic Book Store Regeneration

Season 8 • Episode 15

The gang waits for the reopening of the comic book store; Wolowitz gets some shocking news.

Saturday, July 5

The Empathy Optimization

Season 9 • Episode 13

Leonard, Penny and the gang attempt to treat themselves to a Sheldon-free weekend.

Saturday, July 5

The Colonization Application

Season 8 • Episode 17

Amy finds out that Sheldon applied for a one-way mission to colonize Mars.

Saturday, July 5

The Leftover Thermalization

Season 8 • Episode 18

A magazine article only credits Sheldon in an article about a paper he co-wrote with Leonard.

Saturday, July 5

The Skywalker Incursion

Season 8 • Episode 19

While on their way to UC Berkeley, Sheldon and Leonard take a detour in hope of meeting an idol.

Saturday, July 5

The Fortification Implementation

Season 8 • Episode 20

Sheldon and Amy build a blanket fort; Wolowitz meets a half-brother he didn't know he had.

Saturday, July 5

The Communication Deterioration

Season 8 • Episode 21

The guys fight over a message that could be used for alien contact.

Saturday, July 5

The Graduation Transmission

Season 8 • Episode 22

Wolowitz questions his engineering skills; a canceled flight puts Leonard's plans in jeopardy.

Saturday, July 5

The Maternal Combustion

Season 8 • Episode 23

When Sheldon's and Leonard's mothers finally meet, personalities collide.

Saturday, July 5

The Sales Call Sublimination

Season 9 • Episode 12

Leonard meets with a psychiatrist; Wolowitz and Bernadette struggle when Stuart moves out.

Saturday, July 5

The Beta Test Initiation

Season 5 • Episode 14

Penny and Leonard experiment with their new relationship; Raj forms an unusual bond.

Saturday, July 5

The Habitation Configuration

Season 6 • Episode 7

Sheldon is caught in the middle of Amy and Wil Wheaton's argument.

Saturday, July 5

The Monster Isolation

Season 6 • Episode 17

Koothrappali decides to never leave his apartment; Penny's acting skills impress Sheldon.

Saturday, July 5

The Champagne Reflection

Season 8 • Episode 10

Howard, Leonard and Raj look through their dead professor's research.

Sunday, July 6

The Separation Oscillation

Season 9 • Episode 2

Leonard tries to ease Penny's mind; Sheldon plans a special episode of "Fun With Flags."

Sunday, July 6

The Valentino Submergence

Season 9 • Episode 15

Amy and Sheldon host a Valentine's Day edition of Fun With Flags; Raj is torn between two women.

Sunday, July 6

The Veracity Elasticity

Season 10 • Episode 7

Amy lies about repairs being made to her apartment so she can continue living with Sheldon.

Sunday, July 6

The Separation Agitation

Season 10 • Episode 21

Howard and Bernadette struggle to leave Halley in day care; Bert introduces his new girlfriend.

Sunday, July 6

The Beta Test Initiation

Season 5 • Episode 14

Penny and Leonard experiment with their new relationship; Raj forms an unusual bond.

Sunday, July 6

The Habitation Configuration

Season 6 • Episode 7

Sheldon is caught in the middle of Amy and Wil Wheaton's argument.

Sunday, July 6

The Commitment Determination

Season 8 • Episode 24

While facing relationship changes, Sheldon pushes Penny and Leonard to choose a wedding date.

Sunday, July 6

The Matrimonial Momentum

Season 9 • Episode 1

Penny must decide if she can get past Leonard's bad behavior.

Sunday, July 6

The Separation Oscillation

Season 9 • Episode 2

Leonard tries to ease Penny's mind; Sheldon plans a special episode of "Fun With Flags."

Sunday, July 6

The Bachelor Party Corrosion

Season 9 • Episode 3

A flat tire during Leonard's bachelor party weekend in Mexico tests the guys' skills.

Sunday, July 6

The 2003 Approximation

Season 9 • Episode 4

An impending change inspires Sheldon to revert to 2003, before he met Penny and Leonard.

Sunday, July 6

The Perspiration Implementation

Season 9 • Episode 5

Barry Kripke expresses interest in Amy while leading a fencing lesson for the guys.

Sunday, July 6

The Helium Insufficiency

Season 9 • Episode 6

Leonard and Sheldon try to secure the helium they need during a nation-wide shortage.

Sunday, July 6

The Spock Resonance

Season 9 • Episode 7

Sheldon struggles to keep his emotions in check when he is interviewed for a documentary.

Sunday, July 6

The Mystery Date Observation

Season 9 • Episode 8

Sheldon, Wolowitz and Koothrappali post an ad online to find a new girlfriend for Sheldon.

Sunday, July 6

The Platonic Permutation

Season 9 • Episode 9

Amy and Sheldon spend Thanksgiving at the aquarium -- as friends.

Sunday, July 6

The Earworm Reverberation

Season 9 • Episode 10

Sheldon has a song stuck in his head; despite their awkward date, Amy asks Dave over for dinner.

Sunday, July 6

The Cooper-Hofstadter Polarization

Season 1 • Episode 9

Penny tries to mediate when Sheldon and Leonard disagree about a physics conference.

Sunday, July 6

The White Asparagus Triangulation

Season 2 • Episode 9

Sheldon is thrilled when Leonard starts dating a woman who meets Sheldon's stringent standards.

Sunday, July 6

The Bath Item Gift Hypothesis

Season 2 • Episode 11

Leonard and his friends are tortured by Sheldon's obsession with gift-giving etiquette.

Sunday, July 6

The Vegas Renormalization

Season 2 • Episode 21

Koothrappali and Leonard take Wolowitz to Las Vegas; Sheldon gets locked out of his apartment.

Sunday, July 6

The Justice League Recombination

Season 4 • Episode 11

The guys try to bond with Penny's new boyfriend through a costume contest.

Sunday, July 6

The Good Guy Fluctuation

Season 5 • Episode 7

An attractive comic book artist tests Leonard and Priya's relationship.

Sunday, July 6

The Empathy Optimization

Season 9 • Episode 13

Leonard, Penny and the gang attempt to treat themselves to a Sheldon-free weekend.

Sunday, July 6

The Proposal Proposal

Season 11 • Episode 1

Amy answers Sheldon's marriage proposal; Howard and Bernadette struggle with unexpected news.

Monday, July 7

The Confidence Erosion

Season 11 • Episode 10

Sheldon and Amy try to use math to eliminate wedding planning stress.

Monday, July 7

The Matrimonial Metric

Season 11 • Episode 12

Sheldon and Amy subject their friends to experiments; Penny reveals her feelings about Amy.

Monday, July 7

The Zazzy Substitution

Season 4 • Episode 3

When Sheldon searches for an alternative to human companionship, the guys become concerned.

Monday, July 7

The Hot Troll Deviation

Season 4 • Episode 4

An embarrassing secret of Wolowitz's is revealed; Raj and Sheldon get into a war at work.

Monday, July 7

The Desperation Emanation

Season 4 • Episode 5

Leonard realizes he is the only one in his group without a girlfriend.

Monday, July 7

The Irish Pub Formulation

Season 4 • Episode 6

Leonard keeps an affair a secret from Sheldon, Howard and Raj.

Monday, July 7

The Apology Insufficiency

Season 4 • Episode 7

Sheldon's interview with the FBI jeopardizes Wolowitz's security clearance.

Monday, July 7

The 21-Second Excitation

Season 4 • Episode 8

The guys camp out for a movie screening; Penny and Bernadette invite Amy to her first slumber party.

Monday, July 7

The Boyfriend Complexity

Season 4 • Episode 9

Penny asks Leonard to lie to her father; an all-nighter at a telescope.

Monday, July 7

The Alien Parasite Hypothesis

Season 4 • Episode 10

Koothrappali and Wolowitz try to prove who would be a better superhero.

Monday, July 7

The Herb Garden Germination

Season 4 • Episode 20

Howard decides to take a big step in his relationship with Bernadette.

Monday, July 7

The Isolation Permutation

Season 5 • Episode 8

Amy is devastated when Penny and Bernadette shop for wedding dresses without her.

Monday, July 7

The Wildebeest Implementation

Season 4 • Episode 22

Raj tries to cure his social anxiety; Penny spies on Leonard and his girlfriend through Bernadette.

Monday, July 7

The Engagement Reaction

Season 4 • Episode 23

Howard's mom winds up in the hospital after hearing news of her son's engagement to Bernadette.

Monday, July 7

The Roommate Transmogrification

Season 4 • Episode 24

Bernadette gets her Ph.D., inspiring the guys to tease Wolowitz about his lack of a doctorate.

Monday, July 7

The Skank Reflex Analysis

Season 5 • Episode 1

Penny worries that she has ruined her relationship with her friends.

Monday, July 7

The Infestation Hypothesis

Season 5 • Episode 2

Amy is caught in the middle when Penny and Sheldon argue over a pre-owned chair.

Monday, July 7

The Pulled Groin Extrapolation

Season 5 • Episode 3

Bernadette, Howard and Mrs. Wolowitz spend the weekend together.

Tuesday, July 8

The Bath Item Gift Hypothesis

Season 2 • Episode 11

Leonard and his friends are tortured by Sheldon's obsession with gift-giving etiquette.

Tuesday, July 8

The Maternal Capacitance

Season 2 • Episode 15

Leonard and Penny are drawn together after a disastrous visit from Leonard's mother.

Tuesday, July 8

The Work Song Nanocluster

Season 2 • Episode 18

Penny's home business turns into a complete nightmare when Sheldon takes over.

Tuesday, July 8

The Einstein Approximation

Season 3 • Episode 14

Sheldon tries to figure out the answer to a physics problem by working with Penny.

Tuesday, July 8

The Excelsior Acquisition

Season 3 • Episode 16

Sheldon ends up in traffic court after getting a ticket because of Penny.

Tuesday, July 8

The Wiggly Finger Catalyst

Season 5 • Episode 4

Raj wants a girlfriend, so Penny introduces him to a woman he can communicate with.

Tuesday, July 8

The Russian Rocket Reaction

Season 5 • Episode 5

Wil Wheaton invites Leonard and Sheldon to a party at his house; Howard receives an opportunity.

Tuesday, July 8

The Rhinitis Revelation

Season 5 • Episode 6

Sheldon finds himself competing with the gang for his mother's attention when she visits.

Tuesday, July 8

The Good Guy Fluctuation

Season 5 • Episode 7

An attractive comic book artist tests Leonard and Priya's relationship.

Tuesday, July 8

The Isolation Permutation

Season 5 • Episode 8

Amy is devastated when Penny and Bernadette shop for wedding dresses without her.

Tuesday, July 8

The Flaming Spittoon Acquisition

Season 5 • Episode 10

Sheldon is jealous when Stuart, from the comic book store, asks Amy out on a date.

Tuesday, July 8

The Ornithophobia Diffusion

Season 5 • Episode 9

Leonard and Penny spend time alone; Sheldon tries to face his fear of birds.

Wednesday, July 9

The Precious Fragmentation

Season 3 • Episode 17

A ring from "The Lord of the Rings" at a garage sale threatens to tear the guys apart.

Wednesday, July 9

The Spaghetti Catalyst

Season 3 • Episode 20

Sheldon goes to extremes to keep Leonard and Penny happy when they stop speaking to each other.

Wednesday, July 9

The Wheaton Recurrence

Season 3 • Episode 19

Penny and Leonard have a fight that threatens their relationship; Sheldon and Wil Wheaton face off.

Wednesday, July 9

The Lunar Excitation

Season 3 • Episode 23

Raj and Howard set up an online dating profile for Sheldon and find the perfect woman.

Wednesday, July 9

The Agreement Dissection

Season 4 • Episode 21

Priya dissects the roommate agreement; the ladies take Sheldon dancing.

Wednesday, July 9

The Ornithophobia Diffusion

Season 5 • Episode 9

Leonard and Penny spend time alone; Sheldon tries to face his fear of birds.

Wednesday, July 9

The Speckerman Recurrence

Season 5 • Episode 11

Leonard must face the bully who targeted him in high school; Penny confronts her past actions.

Wednesday, July 9

The Shiny Trinket Maneuver

Season 5 • Episode 12

Amy is upset with Sheldon when he isn't impressed with her recent accomplishment.

Wednesday, July 9

The Recombination Hypothesis

Season 5 • Episode 13

Everything could change when Leonard spontaneously invites Penny to a romantic dinner.

Wednesday, July 9

The Beta Test Initiation

Season 5 • Episode 14

Penny and Leonard experiment with their new relationship; Raj forms an unusual bond.

Wednesday, July 9

The Friendship Contraction

Season 5 • Episode 15

Leonard starts to reconsider his friendship with Sheldon; Wolowitz tries to choose a nickname.

Wednesday, July 9

The Vacation Solution

Season 5 • Episode 16

Sheldon goes to work with Amy in her lab when the university forces him to take a vacation.

Wednesday, July 9

The Flaming Spittoon Acquisition

Season 5 • Episode 10

Sheldon is jealous when Stuart, from the comic book store, asks Amy out on a date.

Thursday, July 10

The Flaming Spittoon Acquisition

Season 5 • Episode 10

Sheldon is jealous when Stuart, from the comic book store, asks Amy out on a date.

Thursday, July 10

The Shiny Trinket Maneuver

Season 5 • Episode 12

Amy is upset with Sheldon when he isn't impressed with her recent accomplishment.

Thursday, July 10

The Deception Verification

Season 7 • Episode 2

Leonard and Sheldon's friendship is tested; Wolowitz's masculinity is threatened.

Thursday, July 10

The Love Spell Potential

Season 6 • Episode 23

Amy and Sheldon's relationship takes a surprising turn during a game of "Dungeons & Dragons."

Thursday, July 10

The Cooper Extraction

Season 7 • Episode 11

While Sheldon is in Texas, the rest of the gang realize how much he has changed their lives.

Thursday, July 10

The Werewolf Transformation

Season 5 • Episode 18

Sheldon's routine is turned upside down when his barber gets sick.

Thursday, July 10

The Weekend Vortex

Season 5 • Episode 19

Sheldon decides to play video games with the guys instead of attending a party with Amy.

Thursday, July 10

The Transporter Malfunction

Season 5 • Episode 20

After receiving new "Star Trek" collectibles, Sheldon finds himself haunted by Mr. Spock.

Thursday, July 10

The Hawking Excitation

Season 5 • Episode 21

When Wolowitz works with Stephen Hawking, Sheldon is determined to meet the famous scientist.

Thursday, July 10

The Stag Convergence

Season 5 • Episode 22

Knowledge of Howard's sexual history makes Bernadette reconsider their future together.

Thursday, July 10

The Launch Acceleration

Season 5 • Episode 23

Wedding plans are jeopardized when NASA reschedules Howard's mission; Leonard surprises Penny.

Thursday, July 10

The Countdown Reflection

Season 5 • Episode 24

The gang tries to help Wolowitz and Bernadette get married before the space launch.

Thursday, July 10

The Speckerman Recurrence

Season 5 • Episode 11

Leonard must face the bully who targeted him in high school; Penny confronts her past actions.

Thursday, July 10

The Decoupling Fluctuation

Season 6 • Episode 2

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

Thursday, July 10

The Higgs Boson Observation

Season 6 • Episode 3

Amy feels threatened by Sheldon's new assistant; space starts to wear on Wolowitz.

Thursday, July 10

The Re-Entry Minimization

Season 6 • Episode 4

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

Thursday, July 10

The Holographic Excitation

Season 6 • Episode 5

The gang heads to Stuart's comic book store to celebrate Halloween.

Friday, July 11

The Locomotive Manipulation

Season 7 • Episode 15

Sheldon and Amy go on a trip to wine country with Howard and Bernadette.

Friday, July 11

The Space Probe Disintegration

Season 8 • Episode 12

The guys agree to do something the girls like; Leonard and Sheldon butt heads.

Friday, July 11

The Celebration Experimentation

Season 9 • Episode 17

For the first time in nine years, the gang celebrates Sheldon's birthday.

Friday, July 11

The Celebration Experimentation

Season 9 • Episode 17

For the first time in nine years, the gang celebrates Sheldon's birthday.

Friday, July 11

The Long Distance Dissonance

Season 10 • Episode 24

Sheldon's former admirer, Dr. Ramona Nowitzki, resurfaces while Amy is away at Princeton.

Friday, July 11

The Justice League Recombination

Season 4 • Episode 11

The guys try to bond with Penny's new boyfriend through a costume contest.

Friday, July 11

The Bus Pants Utilization

Season 4 • Episode 12

Leonard's idea for a smartphone application causes friction in his friendship with Sheldon.

Friday, July 11

The Love Car Displacement

Season 4 • Episode 13

Bernadette runs into her ex-boyfriend (Rick Fox) while attending a science event with Wolowitz.

Friday, July 11

The Thespian Catalyst

Season 4 • Episode 14

Sheldon takes acting lessons from Penny in hope of becoming a better teacher.

Friday, July 11

The Benefactor Factor

Season 4 • Episode 15

A wealthy donor makes Leonard question what he is willing to do for science.

Friday, July 11

The Cohabitation Formulation

Season 4 • Episode 16

Wolowitz considers taking things with Bernadette to the next level.

Friday, July 11

The Toast Derivation

Season 4 • Episode 17

Sheldon is upset when he realizes Leonard is the center of their group of friends.

Friday, July 11

The Prestidigitation Approximation

Season 4 • Episode 18

Leonard must choose between Penny and his new girlfriend, Priya.

Friday, July 11

The Zarnecki Incursion

Season 4 • Episode 19

The guys try to figure out who hacked Sheldon's online-game account.

Friday, July 11

The Herb Garden Germination

Season 4 • Episode 20

Howard decides to take a big step in his relationship with Bernadette.

Friday, July 11

The 43 Peculiarity

Season 6 • Episode 8

Raj and Howard try to figure out why Sheldon disappears at 2:45 every afternoon.

Friday, July 11

The Parking Spot Escalation

Season 6 • Episode 9

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

Friday, July 11

The Fish Guts Displacement

Season 6 • Episode 10

When Amy gets sick, Sheldon tries to nurse her back to health.

Friday, July 11

The Santa Simulation

Season 6 • Episode 11

During a game, Sheldon revisits Christmas memories; finding a date for Koothrappali.

Friday, July 11

The Egg Salad Equivalency

Season 6 • Episode 12

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

Friday, July 11

The Shiny Trinket Maneuver

Season 5 • Episode 12

Amy is upset with Sheldon when he isn't impressed with her recent accomplishment.

Saturday, July 12

The Confidence Erosion

Season 11 • Episode 10

Sheldon and Amy try to use math to eliminate wedding planning stress.

Saturday, July 12

The Solo Oscillation

Season 11 • Episode 13

Sheldon kicks Amy out to work solo; Amy and Leonard bond during a series of science experiments.

Saturday, July 12

The Dependence Transcendence

Season 10 • Episode 3

Sheldon tries an energy drink as the gang races to finish its government project on time.

Saturday, July 12

The Sibling Realignment

Season 11 • Episode 23

Sheldon's mother won't attend his wedding unless he invites his brother.

Saturday, July 12

The Bow Tie Asymmetry

Season 11 • Episode 24

Amy's parents and Sheldon's family arrive; nearly everybody is focused on the wedding plans.

Saturday, July 12

The Opening Night Excitation

Season 9 • Episode 11

After dating for more than five years, Amy and Sheldon spend the night together for the first time.

Saturday, July 12

The Sales Call Sublimination

Season 9 • Episode 12

Leonard meets with a psychiatrist; Wolowitz and Bernadette struggle when Stuart moves out.

Saturday, July 12

The Empathy Optimization

Season 9 • Episode 13

Leonard, Penny and the gang attempt to treat themselves to a Sheldon-free weekend.

Saturday, July 12

The Meemaw Materialization

Season 9 • Episode 14

Sheldon's excitement about his Meemaw's visit fades when she butts heads with Amy.

Saturday, July 12

The Cooper-Nowitzki Theorem

Season 2 • Episode 6

Sheldon and the gang are confused when a young grad student is attracted to him.

Saturday, July 12

The Bath Item Gift Hypothesis

Season 2 • Episode 11

Leonard and his friends are tortured by Sheldon's obsession with gift-giving etiquette.

Saturday, July 12

The Celebration Experimentation

Season 9 • Episode 17

For the first time in nine years, the gang celebrates Sheldon's birthday.

Saturday, July 12

The Application Deterioration

Season 9 • Episode 18

The guys file for a patent on their invention; the girls give dating advice to Koothrappali.

Saturday, July 12

The Solder Excursion Diversion

Season 9 • Episode 19

Sheldon makes a revelation when Amy buys him a new laptop; Leonard and Wolowitz lie to their wives.

Saturday, July 12

The Big Bear Precipitation

Season 9 • Episode 20

Sheldon shares a secret about Leonard when they go on a weekend trip with Penny and Amy.

Saturday, July 12

The Viewing Party Combustion

Season 9 • Episode 21

The gang must choose sides when an argument between Sheldon and Leonard turns into a heated debate.

Saturday, July 12

The Fermentation Bifurcation

Season 9 • Episode 22

The gang runs into Penny's ex while out at a wine bar; Bernadette spends an evening with Sheldon.

Sunday, July 13

The Conjugal Configuration

Season 12 • Episode 1

Penny and Leonard discover they are uncomfortably similar to Amy's parents.

Sunday, July 13

The Wedding Gift Wormhole

Season 12 • Episode 2

Sheldon and Amy go crazy trying to figure out what Leonard and Penny gave them for their wedding.

Sunday, July 13

The Procreation Calculation

Season 12 • Episode 3

Stuart starts bringing his new girlfriend home; Koothrappali explores an arranged marriage.

Sunday, July 13

The Tam Turbulence

Season 12 • Episode 4

Sheldon won't tell anyone why he's never mentioned Tam, his childhood best friend.

Sunday, July 13

The Planetarium Collision

Season 12 • Episode 5

When Amy doesn't have time to work on super-asymmetry, Sheldon schemes to ensure she's available.

Sunday, July 13

The Line Substitution Solution

Season 9 • Episode 23

Sheldon wants to go to a movie screening, so he pays Stuart to spend the day with Amy.

Sunday, July 13

The Convergence Convergence

Season 9 • Episode 24

Leonard's recently divorced parents and Sheldon's devoutly religious mother visit.

Sunday, July 13

The Conjugal Conjecture

Season 10 • Episode 1

The group deals with the aftermath of Sheldon's mother and Leonard's father's evening together.

Sunday, July 13

The Military Miniaturization

Season 10 • Episode 2

Wolowitz has a meeting with Colonel Williams, a representative from the Air Force.

Sunday, July 13

The Dependence Transcendence

Season 10 • Episode 3

Sheldon tries an energy drink as the gang races to finish its government project on time.

Sunday, July 13

The Cohabitation Experimentation

Season 10 • Episode 4

After her apartment floods, Amy suggests that she and Sheldon move in together.

Sunday, July 13

The Hot Tub Contamination

Season 10 • Episode 5

Things do not run smoothly when Amy moves in with Sheldon, and Leonard and Penny have to intervene.

Sunday, July 13

The Fetal Kick Catalyst

Season 10 • Episode 6

At a Comic Con event, Penny learns there are fans of her performance in "Serial Ape-ist."

Sunday, July 13

The Veracity Elasticity

Season 10 • Episode 7

Amy lies about repairs being made to her apartment so she can continue living with Sheldon.

Sunday, July 13

The Brain Bowl Incubation

Season 10 • Episode 8

After a successful gene experiment, Sheldon is determined to convince Amy they should procreate.

Sunday, July 13

The Geology Elevation

Season 10 • Episode 9

Sheldon gets jealous when a co-worker wins an award; Wolowitz finds an old invention.

Sunday, July 13

The Property Division Collision

Season 10 • Episode 10

Sheldon and Leonard divvy up their shared belongings.

Sunday, July 13

The Cooper/Kripke Inversion

Season 6 • Episode 14

Sheldon faces a crisis of confidence when he is forced to work with his nemesis, Barry Kripke.

Sunday, July 13

The Spoiler Alert Segmentation

Season 6 • Episode 15

A fight between Sheldon and Leonard impacts Amy and Penny's living arrangements.

Sunday, July 13

The Tangible Affection Proof

Season 6 • Episode 16

The guys search for Valentine's Day gifts; Stuart and Raj host a "lonely people" party.

Sunday, July 13

The Monster Isolation

Season 6 • Episode 17

Koothrappali decides to never leave his apartment; Penny's acting skills impress Sheldon.

Sunday, July 13

The Contractual Obligation Implementation

Season 6 • Episode 18

Leonard, Sheldon and Wolowitz talk to junior high girls about science-related careers.

Monday, July 14

The Grant Allocation Derivation

Season 12 • Episode 7

Leonard struggles when he's given the responsibility of distributing extra grant money.

Monday, July 14

The Consummation Deviation

Season 12 • Episode 8

Sheldon tries to bond with Amy's father; Wolowitz lures Mr. Fowler away with magic tricks.

Monday, July 14

The Solo Oscillation

Season 11 • Episode 13

Sheldon kicks Amy out to work solo; Amy and Leonard bond during a series of science experiments.

Monday, July 14

The Separation Triangulation

Season 11 • Episode 14

Koothrappali learns the woman he's dating has a very upset husband; Sheldon rents his old room.

Monday, July 14

The Paintball Scattering

Season 12 • Episode 11

Penny and Leonard organize a paintball game, which results in mayhem due to Sheldon's jealousy.

Monday, July 14

The Agreement Dissection

Season 4 • Episode 21

Priya dissects the roommate agreement; the ladies take Sheldon dancing.

Monday, July 14

The Wildebeest Implementation

Season 4 • Episode 22

Raj tries to cure his social anxiety; Penny spies on Leonard and his girlfriend through Bernadette.

Monday, July 14

The Engagement Reaction

Season 4 • Episode 23

Howard's mom winds up in the hospital after hearing news of her son's engagement to Bernadette.

Monday, July 14

The Roommate Transmogrification

Season 4 • Episode 24

Bernadette gets her Ph.D., inspiring the guys to tease Wolowitz about his lack of a doctorate.

Monday, July 14

The Skank Reflex Analysis

Season 5 • Episode 1

Penny worries that she has ruined her relationship with her friends.

Monday, July 14

The Infestation Hypothesis

Season 5 • Episode 2

Amy is caught in the middle when Penny and Sheldon argue over a pre-owned chair.

Monday, July 14

The Pulled Groin Extrapolation

Season 5 • Episode 3

Bernadette, Howard and Mrs. Wolowitz spend the weekend together.

Monday, July 14

The Wiggly Finger Catalyst

Season 5 • Episode 4

Raj wants a girlfriend, so Penny introduces him to a woman he can communicate with.

Monday, July 14

The Hofstadter Insufficiency

Season 7 • Episode 1

Sheldon and Penny share secrets while Leonard is away; Wolowitz helps Raj get over his ex.

Monday, July 14

The Recombination Hypothesis

Season 5 • Episode 13

Everything could change when Leonard spontaneously invites Penny to a romantic dinner.

Monday, July 14

The Scavenger Vortex

Season 7 • Episode 3

Raj designs a scavenger hunt that brings out the best -- and the worst -- in the whole gang.

Monday, July 14

The Raiders Minimization

Season 7 • Episode 4

Sheldon wants revenge after Amy ruins one of his favorite films.

Monday, July 14

The Workplace Proximity

Season 7 • Episode 5

Sheldon and Amy's relationship is tested when she takes a job at his university.

Monday, July 14

The Romance Resonance

Season 7 • Episode 6

Sheldon's latest scientific breakthrough leaves him feeling like a fraud.

Monday, July 14

The Proton Displacement

Season 7 • Episode 7

When Professor Proton asks Leonard for help with an experiment, Sheldon befriends Proton's rival.

Monday, July 14

The Itchy Brain Simulation

Season 7 • Episode 8

When a mistake comes to light, Sheldon punishes Leonard; Penny decides to confront Raj's ex.

Tuesday, July 15

The Application Deterioration

Season 9 • Episode 18

The guys file for a patent on their invention; the girls give dating advice to Koothrappali.

Tuesday, July 15

The Thanksgiving Decoupling

Season 7 • Episode 9

When the gang decides to spend Thanksgiving at Mrs. Wolowitz's house, Sheldon protests.

Tuesday, July 15

The Discovery Dissipation

Season 7 • Episode 10

Amy and Leonard try to help Sheldon deal with his shame; Raj stays with Bernadette and Howard.

Tuesday, July 15

The Cooper Extraction

Season 7 • Episode 11

While Sheldon is in Texas, the rest of the gang realize how much he has changed their lives.

Tuesday, July 15

The Hesitation Ramification

Season 7 • Episode 12

Penny asks Leonard a bold question about their relationship; Sheldon wants to learn how to be funny.

Tuesday, July 15

The Occupation Recalibration

Season 7 • Episode 13

Sheldon must learn how to relax when he is forced to take a vacation.

Tuesday, July 15

The Convention Conundrum

Season 7 • Episode 14

Unable to get Comic-Con tickets, Sheldon tries to hold his own convention.

Tuesday, July 15

The Locomotive Manipulation

Season 7 • Episode 15

Sheldon and Amy go on a trip to wine country with Howard and Bernadette.

Tuesday, July 15

The Beta Test Initiation

Season 5 • Episode 14

Penny and Leonard experiment with their new relationship; Raj forms an unusual bond.

Tuesday, July 15

The Friendship Turbulence

Season 7 • Episode 17

Bernadette tries to negotiate peace between Sheldon and Wolowitz.

Tuesday, July 15

The Mommy Observation

Season 7 • Episode 18

Sheldon is faced with a new reality when he visits his mom in Houston.

Tuesday, July 15

The Indecision Amalgamation

Season 7 • Episode 19

Raj struggles with guilt when he dates two women at once; Penny has a chance to be in a movie.

Tuesday, July 15

The Relationship Diremption

Season 7 • Episode 20

Sheldon has a personal crisis when he decides string theory is a waste of his time.

Tuesday, July 15

The Anything Can Happen Recurrence

Season 7 • Episode 21

Sheldon gives spontaneity a try; Raj asks Howard for help with preparation for a date with Emily.

Tuesday, July 15

The Proton Transmogrification

Season 7 • Episode 22

Professor Proton helps Sheldon deal with grief; Leonard gets into a competition with Penny.

Wednesday, July 16

The Solder Excursion Diversion

Season 9 • Episode 19

Sheldon makes a revelation when Amy buys him a new laptop; Leonard and Wolowitz lie to their wives.

Wednesday, July 16

The Gorilla Dissolution

Season 7 • Episode 23

A bad day compels Penny to re-evaluate her choices -- including Leonard.

Wednesday, July 16

The Status Quo Combustion

Season 7 • Episode 24

Faced with an uncertain future, Sheldon considers a major change.

Wednesday, July 16

The Locomotion Interruption

Season 8 • Episode 1

Leonard and Amy make an unexpected trip to Arizona to fetch Sheldon; Penny goes for an interview.

Wednesday, July 16

The Junior Professor Solution

Season 8 • Episode 2

Amy takes advantage of the tension between Penny and Bernadette.

Wednesday, July 16

The First Pitch Insufficiency

Season 8 • Episode 3

Wolowitz feels nervous when he is asked to throw the first pitch at a Los Angeles Angels game.

Wednesday, July 16

The Hook-Up Reverberation

Season 8 • Episode 4

Raj's honesty comes back to haunt him when his new girlfriend is unfriendly to Penny.

Wednesday, July 16

The Focus Attenuation

Season 8 • Episode 5

During their weekend in Las Vegas, Bernadette and Amy accuse Penny of being a buzz kill.

Wednesday, July 16

The Friendship Contraction

Season 5 • Episode 15

Leonard starts to reconsider his friendship with Sheldon; Wolowitz tries to choose a nickname.

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