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The Big Bang Theory: Season 9

📺 Season 9 24 Episodes 2015-09-21 EN

Season Overview

Our two genius roommates, Leonard and Sheldon, and their friends are back once again (smarter, but no wiser). Last season, Sheldon went soul-searching (on a train, of course) and was prepared to make some substantial revisions on his Relationship Agreement with Amy, when everything changed. Leonard, meanwhile, was off to Vegas with Penny to finally tie the knot in the season finale. Howard finds himself alone with Bernadette after the sudden passing of his mother; while Raj is not only talking to women – he’s getting exclusive with Emily. Together, they will all learn that life is far more complicated outside of the lab as love and friendship never produce predictable results!

Download links are currently being prepared for this season. Check back shortly!

Episodes (24)

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The Matrimonial Momentum S09E01 19 min

The Matrimonial Momentum

Air 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.

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The Separation Oscillation S09E02 19 min

The Separation Oscillation

Air 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.

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The Bachelor Party Corrosion S09E03 19 min

The Bachelor Party Corrosion

Air 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.

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The 2003 Approximation S09E04 19 min

The 2003 Approximation

Air 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.

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The Perspiration Implementation S09E05 19 min

The Perspiration Implementation

Air 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.

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The Helium Insufficiency S09E06 19 min

The Helium Insufficiency

Air 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.

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The Spock Resonance S09E07 19 min

The Spock Resonance

Air 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.

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The Mystery Date Observation S09E08 18 min

The Mystery Date Observation

Air 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 on her.

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The Platonic Permutation S09E09 21 min

The Platonic Permutation

Air 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.

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The Earworm Reverberation S09E10 21 min

The Earworm Reverberation

Air 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".

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The Opening Night Excitation S09E11 21 min

The Opening Night Excitation

Air 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.

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The Sales Call Sublimation S09E12 18 min

The Sales Call Sublimation

Air 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.

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The Empathy Optimization S09E13 19 min

The Empathy Optimization

Air 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.

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The Meemaw Materialization S09E14 19 min

The Meemaw Materialization

Air 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.

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The Valentino Submergence S09E15 20 min

The Valentino Submergence

Air 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.

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The Positive Negative Reaction S09E16 19 min

The Positive Negative Reaction

Air 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.

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The Celebration Experimentation S09E17 19 min

The Celebration Experimentation

Air Date: 2016-02-25

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

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The Application Deterioration S09E18 18 min

The Application Deterioration

Air 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.

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The Solder Excursion Diversion S09E19 21 min

The Solder Excursion Diversion

Air 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.

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The Big Bear Precipitation S09E20 19 min

The Big Bear Precipitation

Air 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.

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The Viewing Party Combustion S09E21 18 min

The Viewing Party Combustion

Air 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.

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The Fermentation Bifurcation S09E22 20 min

The Fermentation Bifurcation

Air 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.

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The Line Substitution Solution S09E23 18 min

The Line Substitution Solution

Air 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.

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The Convergence Convergence S09E24 20 min

The Convergence Convergence

Air 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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