The Big Bang Theory · Season 9
24 episodes listed, beginning 2015-09-21.
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- Episode 1
The Matrimonial Momentum
30 minutes
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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.
- Episode 2
The Separation Oscillation
30 minutes
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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.
- Episode 3
The Bachelor Party Corrosion
30 minutes
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The guys surprise Leonard with a belated bachelor-party weekend in Mexico, but their plans hit a bump in the road when they get a flat tire on the way. Meanwhile, the girls lean on Penny to tell her unsuspecting family that she and Leonard eloped.
- Episode 4
The 2003 Approximation
30 minutes
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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.
- Episode 5
The Perspiration Implementation
30 minutes
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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.
- Episode 6
The Helium Insufficiency
30 minutes
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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.
- Episode 7
The Spock Resonance
30 minutes
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While being interviewed for a documentary about Spock from "Star Trek", Sheldon struggles to suppress his emotions about his recent break-up with Amy. Also, Wolowitz and Bernadette butt heads over remodeling his childhood home.
- Episode 8
The Mystery Date Observation
30 minutes
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When Leonard, Penny and Bernadette learn that Amy is going out on a dinner date, the trio set out to spy on her and the guy. Meanwhile, Sheldon recruits Raj and Howard to find a woman for him, since they were responsible for getting Amy and him together.
- Episode 9
The Platonic Permutation
30 minutes
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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.
- Episode 10
The Earworm Reverberation
30 minutes
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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".
- Episode 11
The Opening Night Excitation
30 minutes
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As the guys prepare to go to the premiere of the new Star Wars movie, Sheldon plans a special event for Amy's birthday. Also, Leonard, Wolowitz, and Koothrappali must decide who will take their extra Star Wars movie ticket.
- Episode 12
The Sales Call Sublimation
30 minutes
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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.
- Episode 13
The Empathy Optimization
30 minutes
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After having to deal with a sick Sheldon, Leonard, Penny and the gang try to treat themselves to a Sheldon-free weekend.
- Episode 14
The Meemaw Materialization
30 minutes
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Sheldon's 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.
- Episode 15
The Valentino Submergence
30 minutes
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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.
- Episode 16
The Positive Negative Reaction
30 minutes
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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.
- Episode 17
The Celebration Experimentation
30 minutes
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After more than nine years together, the gang finally celebrates Sheldon's birthday, surprising him with a special guest.
- Episode 18
The Application Deterioration
30 minutes
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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.
- Episode 19
The Solder Excursion Diversion
30 minutes
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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.
- Episode 20
The Big Bear Precipitation
30 minutes
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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.
- Episode 21
The Viewing Party Combustion
30 minutes
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Everyone must choose sides when a small argument between Leonard and Sheldon erupts into a heated fight during a group get-together.
- Episode 22
The Fermentation Bifurcation
30 minutes
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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.
- Episode 23
The Line Substitution Solution
30 minutes
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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.
- Episode 24
The Convergence Convergence
30 minutes
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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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