About the Show
Arch-nerds Leonard and Sheldon may know more than their fair share about subatomic particles, but when it comes to people in general, and women in particular, they're absolutely clueless...
Series 9 Summary
Penny struggles with Leonard's confession that he kissed another woman when he was on his North Sea research expedition as the ninth season of the US comedy about socially clueless scientists begins
Episode 1 - The Matrimonial Momentum
After driving all the way to Las Vegas for her wedding to Leonard, Penny now faces a dilemma. At home, Sheldon doesn't know how to act after Amy tells him she's taking a break from their relationship.
Episode 2 - The Separation Oscillation
Leonard confronts the woman he kissed on a research expedition as he tries to put Penny's mind at ease about the fact that they still work together. Sheldon films a special episode of Fun with Flags.
Episode 3 - The Bachelor Party Corrosion
The guys' science skills are put to the test when they get a flat tyre during Leonard's surprise bachelor party weekend in Mexico. The girls force Penny to tell her family she has eloped with Leonard.
Episode 4 - The 2003 Approximation
Penny and Leonard announce they're moving in together, so Sheldon decides to revisit 2003, a simpler time before he had met either of them. Howard and Raj form a band to play at the comic book shop.
Episode 5 - The Perspiration Implementation
The guys take fencing lessons from Barry Kripke, but Sheldon feels awkward when Kripke expresses a romantic interest in Amy. Stuart struggles to attract female customers to the comic book shop.
Episode 6 - The Helium Insufficiency
Sheldon and Leonard struggle to find the supplies they need for an experiment. Penny and Bernadette download a dating app onto Amy's phone to find her a new boyfriend, but does she need their help?
Episode 7 - The Spock Resonance
While being interviewed for a documentary on Star Trek character Mr Spock, Sheldon struggles to suppress his emotions about his recent break-up with Amy, leaving Leonard and Penny in a state of shock
Episode 8 - The Mystery Date Observation
Sheldon enlists the help of Howard and Raj to find him a new girlfriend by posting online. When Amy is coy with the details about the guy she's dating, Penny and Bernadette decide to spy on them.
Episode 9 - The Platonic Permutation
Sheldon and Amy try hanging out as friends when they spend Thanksgiving together at the aquarium. Howard reluctantly agrees to volunteer at a soup kitchen with Bernadette, Raj and Emily.
Episode 10 - The Earworm Reverberation
Sheldon is driven to distraction when he can't get a familiar tune out of his head or recall the name of the song. Amy and Dave arrange another date. Howard and Raj find out that their band has a fan.