The Big Bang Theory (2007)

The Big Bang Theory is centered on five characters living in Pasadena, California: roommates Leonard Hofstadter and Sheldon Cooper; Penny, a waitress and aspiring actress who lives across the hall; and Leonard and Sheldon's equally geeky and socially awkward friends and co-workers, mechanical engineer Howard Wolowitz and astrophysicist Raj Koothrappali. The geekiness and intellect of the four guys is contrasted for comic effect with Penny's social skills and common sense.

  • Chuck Lorre
  • Bill Prady
  • Adam Faberman

Release Date: 2007-09-24
Seasons: 1 2 3 4 5 6 7 8 9 10 11 12
metacritic icon 8.0/10
themoviedb icon 6.8/10
  • Country: US
  • Language: En
  • Runtime: 22
Season 9 Episode List
  • The Matrimonial Momentum

    Episode 1 - The Matrimonial Momentum

    Release Date: 2015-09-21

    After driving to Vegas to get married, Penny struggles with Leonard’s confession that he kissed another girl. Also, Sheldon doesn't know how to act after Amy pushes pause on their relationship.

  • The Separation Oscillation

    Episode 2 - The Separation Oscillation

    Release Date: 2015-09-28

    Leonard confronts the woman he kissed on the North Sea in an attempt to set Penny's mind at ease. Also, Sheldon films a special episode of "Fun with Flags" after his breakup with Amy, and Bernadette feels guilty about withholding a secret from Penny.

  • The Bachelor Party Corrosion

    Episode 3 - The Bachelor Party Corrosion

    Release Date: 2015-10-05

    The guys' science skills are put to the test when they get a flat tire during Leonard's bachelor party weekend in Mexico. Also, the girls force Penny to finally tell her family that she eloped with Leonard.

  • The 2003 Approximation

    Episode 4 - The 2003 Approximation

    Release Date: 2015-10-12

    Sheldon learns of an impending change in his living arrangements and decides to revert back to 2003, a simpler time before he met Leonard and Penny. Also, Howard and Raj form a band to play at the Comic Book Store.

  • The Perspiration Implementation

    Episode 5 - The Perspiration Implementation

    Release Date: 2015-10-19

    The guys take a fencing lesson from Barry Kripke and Sheldon finds himself in an awkward position when Kripke expresses interest in Amy. Also, when Stuart struggles to get female customers at the Comic Book Store, Penny, Amy and Bernadette come by to help him out.

  • The Helium Insufficiency

    Episode 6 - The Helium Insufficiency

    Release Date: 2015-10-26

    In the midst of a nation-wide helium shortage, Sheldon and Leonard take desperate measures to get the supplies they need. Also, Penny and Bernadette download a dating app on Amy's phone to try and find her a new man.

  • The Spock Resonance

    Episode 7 - The Spock Resonance

    Release Date: 2015-11-05

    Wil Wheaton interviews Sheldon for a Star Trek documentary where he reveals the ring and his plan to propose to Amy. Bernadette wants to start renovating the house and the topic of starting a family together with Howard is brought up.

  • The Mystery Date Observation

    Episode 8 - The Mystery Date Observation

    Release Date: 2015-11-12

    Sheldon, Wolowitz and Koothrappali post an online advertisement to find Sheldon a new girlfriend. Also, when Amy is coy with details about a guy she is dating, Penny and Bernadette decide to spy

  • The Platonic Permutation

    Episode 9 - The Platonic Permutation

    Release Date: 2015-11-19

    Sheldon and Amy try hanging out as friends when they spend Thanksgiving together at the aquarium. Also, Wolowitz reluctantly agrees to volunteer at the soup kitchen with Bernadette, Raj and Emily, and Penny discovers that Leonard knows more about her than she thought.

  • The Earworm Reverberation

    Episode 10 - The Earworm Reverberation

    Release Date: 2015-12-10

    Sheldon has a revelation when he realizes why a song was stuck in his head. Also, Amy invites Dave over for dinner despite their previously awkward date, and Wolowitz and Koothrappali become obsessed with a fan of their band, "Footprints on the Moon".

  • The Opening Night Excitation

    Episode 11 - The Opening Night Excitation

    Release Date: 2015-12-17

    After more than five years of dating, Sheldon and Amy spend their first night together. Also, Leonard, Wolowitz, and Koothrappali must decide who will take their extra Star Wars movie ticket.

  • The Sales Call Sublimation

    Episode 12 - The Sales Call Sublimation

    Release Date: 2016-01-07

    Penny gets more than she bargained for when Leonard agrees to meet with a psychiatrist on her behalf. Also, Sheldon and Koothrappali collaborate on an astronomical discovery, and Wolowitz and Bernadette can't believe what they are feeling after Stuart moves out.

  • The Empathy Optimization

    Episode 13 - The Empathy Optimization

    Release Date: 2016-01-14

    After having to deal with a sick Sheldon, Leonard, Penny and the gang try to treat themselves to a Sheldon-free weekend.

  • The Meemaw Materialization

    Episode 14 - The Meemaw Materialization

    Release Date: 2016-02-04

    Meemaw meets Amy, but it isn't all roses. Meemaw seems to have an axe to grind with her. Sheldon comes to Amy's defense, but not before Meemaw lets a little secret of his slip.

  • The Valentino Submergence

    Episode 15 - The Valentino Submergence

    Release Date: 2016-02-11

    Sheldon and Amy host a live Valentine's Day episode of Fun with Flags, Leonard and Penny grapple with getting older, Howard and Bernadette find a surprise in their hot tub and Raj is torn between Emily and the cute girl he met at the Comic Bookstore.

  • The Positive Negative Reaction

    Episode 16 - The Positive Negative Reaction

    Release Date: 2016-02-18

    When the gang finds out about Bernadette’s pregnancy, they celebrate by singing karaoke. Also, Bernadette is concerned when Wolowitz freaks out over her pregnancy announcement, and Wolowitz is convinced he must make more money to provide for the baby.

  • The Celebration Experimentation

    Episode 17 - The Celebration Experimentation

    Release Date: 2016-02-25

    After more than nine years together, the gang finally celebrates Sheldon’s birthday, surprising him with a special guest.

  • The Application Deterioration

    Episode 18 - The Application Deterioration

    Release Date: 2016-03-10

    Leonard, Sheldon, and Wolowitz run into problems when they file for a patent for their infinite persistence gyroscope. Also, Penny, Amy and Bernadette give Koothrappali dating advice when Emily reaches out to him after their breakup.

  • The Solder Excursion Diversion

    Episode 19 - The Solder Excursion Diversion

    Release Date: 2016-03-31

    Amy is shocked at a revelation from Sheldon after she buys him a new laptop. Also, Koothrappali sells out Leonard and Wolowitz after they lie to their wives in order to attend an early screening of a movie.

  • The Big Bear Precipitation

    Episode 20 - The Big Bear Precipitation

    Release Date: 2016-04-07

    Sheldon spills a secret of Leonard’s when the two take a weekend cabin trip with Penny and Amy. Also, when Koothrappali goes overboard with pregnancy gifts, Wolowitz and Bernadette must draw the line.

  • The Viewing Party Combustion

    Episode 21 - The Viewing Party Combustion

    Release Date: 2016-04-21

    Everyone must choose sides when a small argument between Leonard and Sheldon erupts into a heated fight during a group get-together.

  • The Fermentation Bifurcation

    Episode 22 - The Fermentation Bifurcation

    Release Date: 2016-04-28

    The gang goes to a wine bar and runs into Penny’s old boyfriend, Zack. Also, Bernadette gets stuck spending the evening with Sheldon when she can’t go wine tasting with the group, and things don’t go as planned when Koothrappali introduces his new girlfriend, Claire.

  • The Line Substitution Solution

    Episode 23 - The Line Substitution Solution

    Release Date: 2016-05-05

    Sheldon hires Stuart to spend the day with Amy when he’d rather go to a movie screening. Also, Leonard’s mother, Beverly, comes to town and Penny struggles to make a connection with her.

  • The Convergence Convergence

    Episode 24 - The Convergence Convergence

    Release Date: 2016-05-12

    Chaos ensues when Leonard’s recently divorced parents, Alfred and Beverly, and Sheldon’s devoutly religious mother, Mary, come to town. Also, Wolowitz and Koothrappali think the government is out to get them when they are contacted about their guidance system.

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