The BEST episodes of The Big Bang Theory season 9
Every episode of The Big Bang Theory season 9, ranked from best to worst by thousands of votes from fans of the show. The best episodes of The Big Bang Theory season 9!
A woman who moves into an apartment across the hall from two brilliant but socially awkward physicists shows them how little they know about life outside of the laboratory.
#1 - The Opening Night Excitation
Season 9 - Episode 11 - Aired 12/17/2015
As the guys prepare to go to the premiere of the new Star Wars movie, Sheldon plans a special event for Amy's birthday.
#2 - The Earworm Reverberation
Season 9 - Episode 10 - Aired 12/10/2015
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."
#3 - The Convergence Convergence
Season 9 - Episode 24 - Aired 5/12/2016
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.
#4 - The Platonic Permutation
Season 9 - Episode 9 - Aired 11/19/2015
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.
#5 - The Positive Negative Reaction
Season 9 - Episode 16 - Aired 2/18/2016
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.
#6 - The Mystery Date Observation
Season 9 - Episode 8 - Aired 11/12/2015
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.
#7 - The Bachelor Party Corrosion
Season 9 - Episode 3 - Aired 10/5/2015
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.
#8 - The Application Deterioration
Season 9 - Episode 18 - Aired 3/10/2016
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.
#9 - The Spock Resonance
Season 9 - Episode 7 - Aired 11/5/2015
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.
#10 - The Empathy Optimization
Season 9 - Episode 13 - Aired 1/14/2016
The gang decides to head to Vegas for the week on a party bus. Sheldon learns about the importance of empathy and saying sorry.
#11 - The Valentino Submergence
Season 9 - Episode 15 - Aired 2/11/2016
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.
#12 - The Meemaw Materialization
Season 9 - Episode 14 - Aired 2/4/2016
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.
#13 - The Fermentation Bifurcation
Season 9 - Episode 22 - Aired 4/28/2016
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.
#14 - The Big Bear Precipitation
Season 9 - Episode 20 - Aired 4/7/2016
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.
#15 - The Solder Excursion Diversion
Season 9 - Episode 19 - Aired 3/31/2016
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.
#16 - The Viewing Party Combustion
Season 9 - Episode 21 - Aired 4/21/2016
Everyone must choose sides when a small argument between Leonard and Sheldon erupts into a heated fight during a group get-together.
#17 - The Separation Oscillation
Season 9 - Episode 2 - Aired 9/28/2015
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.
#18 - The Celebration Experimentation
Season 9 - Episode 17 - Aired 2/25/2016
After more than nine years together, the gang finally celebrates Sheldon’s birthday, surprising him with a special guest.
#19 - The Line Substitution Solution
Season 9 - Episode 23 - Aired 5/5/2016
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.
#20 - The Sales Call Sublimation
Season 9 - Episode 12 - Aired 1/7/2016
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.
#21 - The Perspiration Implementation
Season 9 - Episode 5 - Aired 10/19/2015
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.
#22 - The 2003 Approximation
Season 9 - Episode 4 - Aired 10/12/2015
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.
#23 - The Helium Insufficiency
Season 9 - Episode 6 - Aired 10/26/2015
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.
#24 - The Matrimonial Momentum
Season 9 - Episode 1 - Aired 9/21/2015
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.
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