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- Season 9 overviewSep 21, 2015-May 12, 201624 episodesSeason 9 episodes1. The Matrimonial Momentum Sep 21, 2015
- Penny must decide if she can get past Leonard's bad behavior.
- 2. The Separation Oscillation Sep 28, 2015
- Leonard tries to ease Penny's mind; Sheldon plans a special episode of "Fun With Flags."
- 3. The Bachelor Party Corrosion Oct 5, 2015
- A flat tire during Leonard's bachelor party weekend in Mexico tests the guys' skills.
- 4. The 2003 Approximation Oct 12, 2015
- An impending change inspires Sheldon to revert to 2003, before he met Penny and Leonard.
- 5. The Perspiration Implementation Oct 19, 2015
- Barry Kripke expresses interest in Amy while leading a fencing lesson for the guys.
- 6. The Helium Insufficiency Oct 26, 2015
- Leonard and Sheldon try to secure the helium they need during a nation-wide shortage.
- 7. The Spock Resonance Nov 5, 2015
- Sheldon struggles to keep his emotions in check when he is interviewed for a documentary.
- 8. The Mystery Date Observation Nov 12, 2015
- Sheldon, Wolowitz and Koothrappali post an ad online to find a new girlfriend for Sheldon.
- 9. The Platonic Permutation Nov 19, 2015
- Amy and Sheldon spend Thanksgiving at the aquarium -- as friends.
- 10. The Earworm Reverberation Dec 10, 2015
- Sheldon has a song stuck in his head; despite their awkward date, Amy asks Dave over for dinner.
- 11. The Opening Night Excitation Dec 17, 2015
- After dating for more than five years, Amy and Sheldon spend the night together for the first time.
- 12. The Sales Call Sublimination Jan 7, 2016
- Leonard meets with a psychiatrist; Wolowitz and Bernadette struggle when Stuart moves out.
- 13. The Empathy Optimization Jan 14, 2016
- Leonard, Penny and the gang attempt to treat themselves to a Sheldon-free weekend.
- 14. The Meemaw Materialization Feb 4, 2016
- Sheldon's excitement about his Meemaw's visit fades when she butts heads with Amy.
- 15. The Valentino Submergence Feb 11, 2016
- Amy and Sheldon host a Valentine's Day edition of Fun With Flags; Raj is torn between two women.
- 16. The Positive Negative Reaction Feb 18, 2016
- The gang celebrates news of Bernadette's pregnancy by singing karaoke.
- 17. The Celebration Experimentation Feb 25, 2016
- For the first time in nine years, the gang celebrates Sheldon's birthday.
- 18. The Application Deterioration Mar 10, 2016
- The guys file for a patent on their invention; the girls give dating advice to Koothrappali.
- 19. The Solder Excursion Diversion Mar 31, 2016
- Sheldon makes a revelation when Amy buys him a new laptop; Leonard and Wolowitz lie to their wives.
- 20. The Big Bear Precipitation Apr 7, 2016
- Sheldon shares a secret about Leonard when they go on a weekend trip with Penny and Amy.
- 21. The Viewing Party Combustion Apr 21, 2016
- The gang must choose sides when an argument between Sheldon and Leonard turns into a heated debate.
- 22. The Fermentation Bifurcation Apr 28, 2016
- The gang runs into Penny's ex while out at a wine bar; Bernadette spends an evening with Sheldon.
- 23. The Line Substitution Solution May 5, 2016
- Sheldon wants to go to a movie screening, so he pays Stuart to spend the day with Amy.
- 24. The Convergence Convergence May 12, 2016
- Leonard's recently divorced parents and Sheldon's devoutly religious mother visit.
The ninth season of the American sitcom The Big Bang Theory aired on CBS from September 2015 to May 2016. It featured the elopement of Leonard and Penny, the breakup and reconciliation of Sheldon and Amy, and the introduction of new characters such as Mary Cooper and Meemaw.
Watch The Big Bang Theory on Max. Plans start at $9.99/month. Physicists and best friends Leonard and Sheldon learn about the social aspects of life through their relationships with the free-spirited beauty who moves in next door.
Find out the cast, episodes, trivia and more of the ninth season of the popular sitcom The Big Bang Theory. See the dates, titles and summaries of the 24 episodes that aired from September 2015 to May 2016.
Sep 21, 2015 · Find out what happened in the ninth season of the hit sitcom The Big Bang Theory, from Sheldon and Amy's break-up and reunion to Leonard and Penny's elopement and pregnancy. Browse the episode titles, dates, summaries and DVD information for each episode.
Find out the titles, dates, ratings and summaries of all 24 episodes of season 9 of The Big Bang Theory, the popular sitcom about four nerdy friends and their girlfriends. See how Sheldon, Leonard, Penny, Amy and the gang deal with love, work, family and fun.
Sep 21, 2015 · Find out what happened in season 9 of the comedy series about nerdy physicists and their friends. Watch the episode guide, summaries, cast and more on TV Guide.
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Sep 21, 2015 · Find out the plot, cast, ratings and trivia of season 9 of the popular sitcom The Big Bang Theory. Follow the adventures of Sheldon, Leonard, Penny and the gang as they face new challenges and relationships.
