The Big Bang Theory

Episodes

Season 9 · 24 episodes

• E1 The Matrimonial Momentum
  Sep 21, 2015 25 min

  Sheldon is confronted by a mystery of the universe he cannot unravel: when Amy presses pause on their relationship. Meanwhile, in Las Vegas, Penny struggles with Leonard's confession that he kissed another girl.

• E2 The Separation Oscillation
  Sep 28, 2015 25 min

  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.

• E3 The Bachelor Party Corrosion
  Oct 5, 2015 25 min

  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.

• E4 The 2003 Approximation
  Oct 12, 2015 25 min

  Leonard and Penny finally move in together leaving Sheldon very upset with this big change in his life and wishing he could go back to a time when he had no emotions in 2003 before he met Leonard. Raj, Howard and Stuart attempt to form a band.

• E5 The Perspiration Implementation
  Oct 19, 2015 25 min

  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.

• E6 The Helium Insufficiency
  Oct 26, 2015 25 min

  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.

• E7 The Spock Resonance
  Nov 5, 2015 25 min

  Adam Nimoy, friend of Wil Wheaton and son of Leonard Nimoy, interviews Sheldon for a "Star Trek" documentary, but Sheldon goes off topic and has trouble suppressing his emotions about his recent break-up from Amy. Bernadette wants to start renovating the house and the issue of starting a family with Howard is brought up.

• E8 The Mystery Date Observation
  Nov 12, 2015 25 min

  Amy has a formal date which Leonard, Penny and Bernadette secretly spy on. Sheldon has Howard and Raj help him find a new girlfriend since they found Amy for him.

• E9 The Platonic Permutation
  Nov 19, 2015 25 min

  It’s Thanksgiving. Sheldon and Amy go on a lunch date to the aquarium as friends. Meanwhile, Howard, Bernadette, Raj and Emily help out at a soup kitchen and Leonard and Penny make their first Thanksgiving dinner as a married couple.

• E10 The Earworm Reverberation
  Dec 10, 2015 25 min

  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."

• E11 The Opening Night Excitation
  Dec 17, 2015 25 min

  As the guys prepare to go to the premiere of the new Star Wars movie, Sheldon plans a special event for Amy's birthday.

• E12 The Sales Call Sublimation
  Jan 7, 2016 25 min

  Leonard visits a psychiatrist so Penny can make a sales call. Stuart moves out of the Wolowitz house. Sheldon works with Raj looking for extra-solar planets.

• E13 The Empathy Optimization
  Jan 14, 2016 25 min

  The gang decides to head to Vegas for the week on a party bus. Sheldon learns about the importance of empathy and saying sorry.

• E14 The Meemaw Materialization
  Feb 4, 2016 25 min

  Sheldon is thrilled when his Meemaw comes to visit, but his excitement quickly fades when she butts heads with Amy. Also, Raj meets a new girl at the comic book store who makes him question his relationship with Emily.

• E15 The Valentino Submergence
  Feb 11, 2016 25 min

  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.

• E16 The Positive Negative Reaction
  Feb 18, 2016 25 min

  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 a baby.

• E17 The Celebration Experimentation
  Feb 25, 2016 25 min

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

• E18 The Application Deterioration
  Mar 10, 2016 25 min

  Sheldon works up a contract to split their portion of their guidance system invention royalties, but Bernadette does not like how it's done. Raj must again decide between Emily and Claire when they both contact him.

• E19 The Solder Excursion Diversion
  Mar 31, 2016 25 min

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

• E20 The Big Bear Precipitation
  Apr 7, 2016 25 min

  Secrets are revealed when Amy and Sheldon join Penny and Leonard on a weekend cabin trip. Raj is more excited about Howard's and Bernadette's impending parenthood than they are.

• E21 The Viewing Party Combustion
  Apr 21, 2016 25 min

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

• E22 The Fermentation Bifurcation
  Apr 28, 2016 25 min

  Sheldon and Bernadette spend a night together while the rest of the gang goes to a wine tasting party, but things get uncomfortable for Raj when Zack also attends and takes an interest in Claire.

• E23 The Line Substitution Solution
  May 5, 2016 25 min

  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.

• E24 The Convergence Convergence
  May 12, 2016 25 min

  Leonard and Penny get remarried in front of their friends, Leonard's parents, Beverly and Alfred and Sheldon's mother, Mary, who finds something in common with Alfred. Howard gets an unknown email from the Air Force about his invention.