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- Season 12 overviewSep 24, 2018-May 16, 201924 episodesSeason 12 episodes1. The Conjugal Configuration Sep 24, 2018
- Penny and Leonard discover they are uncomfortably similar to Amy's parents.
- 2. The Wedding Gift Wormhole Sep 27, 2018
- Sheldon and Amy go crazy trying to figure out what Leonard and Penny gave them for their wedding.
- 3. The Procreation Calculation Oct 4, 2018
- Stuart starts bringing his new girlfriend home; Koothrappali explores an arranged marriage.
- 4. The Tam Turbulence Oct 11, 2018
- Sheldon won't tell anyone why he's never mentioned Tam, his childhood best friend.
- 5. The Planetarium Collision Oct 18, 2018
- When Amy doesn't have time to work on super-asymmetry, Sheldon schemes to ensure she's available.
- 6. The Imitation Perturbation Oct 25, 2018
- Sheldon seeks retaliation when Wolowitz dresses up as Sheldon for Halloween.
- 7. The Grant Allocation Derivation Nov 1, 2018
- Leonard struggles when he's given the responsibility of distributing extra grant money.
- 8. The Consummation Deviation Nov 8, 2018
- Sheldon tries to bond with Amy's father; Wolowitz lures Mr. Fowler away with magic tricks.
- 9. The Citation Negation Nov 15, 2018
- Sheldon and Amy are devastated after learning that Super Asymmetry has already been disproved.
- 10. The VCR Illumination Dec 6, 2018
- A VHS tape from Sheldon's past inspires him not to give up; Bernadette tries to help Wolowitz.
- 11. The Paintball Scattering Jan 3, 2019
- Penny and Leonard organize a paintball game, which results in mayhem due to Sheldon's jealousy.
- 12. The Propagation Proposition Jan 10, 2019
- Penny's ex-boyfriend Zack learns that he is infertile, so he asks Leonard for help.
- 13. The Confirmation Polarization Jan 17, 2019
- A rival team of physicists tries to take credit for Amy and Sheldon's super asymmetry theory.
- 14. The Meteorite Manifestation Jan 31, 2019
- Leonard is disappointed when his friends exclude him from a scientific project.
- 15. The Donation Oscillation Feb 7, 2019
- Penny tries to throw a wrench into Leonard's plan to be a sperm donor for her ex-boyfriend.
- 16. The D & D Vortex Feb 21, 2019
- The gang fights for the one open seat at Wil Wheaton's celebrity Dungeons and Dragons game.
- 17. The Conference Valuation Mar 7, 2019
- When Penny and Bernadette go to a convention, Wolowitz is left in charge of the kids.
- 18. The Laureate Accumulation Apr 4, 2019
- Sheldon and Amy try to win over Nobel laureates Kip Thorne, George Smoot and Frances Arnold.
- 19. The Inspiration Deprivation Apr 18, 2019
- Wolowitz buys a scooter that looks like the one he had years ago.
- 20. The Decision Reverberation Apr 25, 2019
- Koothrappali publishes a paper that suggests he may have discovered alien life.
- 21. The Plagiarism Schism May 2, 2019
- Kripke has proof that Dr. Pemberton plagiarized his thesis in college.
- 22. The Maternal Conclusion May 9, 2019
- Leonard is pleasantly surprised when Beverly comes to visit and she's genuinely kind to him.
- 23. The Change Constant May 16, 2019
- Sheldon and Amy await big news.
- 24. The Stockholm Syndrome May 16, 2019
- Bernadette and Wolowitz leave their kids for the first time; Penny and Leonard try to keep a secret.
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