After Sheldon’s mother and Leonard’s father share an evening together, everyone deals with an awkward morning the next day. Also, Penny’s family arrives for the wedding ceremony, including her anxiety-ridden mother, Susan, and her drug dealing brother, Randall.
Season 10, Episode 02 – “The Military Miniaturization”
The guys heads are in a spin when an Air Force bigwig approaches them about their revolutionary gyroscope invention; and Bernadette is upset with Penny after she accidentally leaks a secret to the mom-to-be’s coworkers about her being pregnant.
Season 10, Episode 03 – “The Dependence Transcendence”
Bernadette is upset with Penny after she accidentally leaks a secret to the mom-to-be’s coworkers about her being pregnant.
Season 10, Episode 04 – “The Cohabitation Experimentation”
Sheldon and Amy decide to move in together when her apartment floods. Meanwhile, Howard and Bernadette become upset when Koothrappali learns the gender of the baby before they do.
Season 10, Episode 05 – “The Hot Tub Contamination”
Amy and Sheldon’s live-in relationship may be in the toilet after he accuses her of not following the bathroom schedule. Meanwhile, Howard and Bernadette’s secret stay-cation is interrupted by interfering interlopers who are sneaking into their hot tub.
Season 10, Episode 06 – “The Fetal Kick Catalyst”
Feeling his fetal offspring kick sends Howard on a baby-items buying binge with Raj; Sheldon and Amy host a brunch in their new digs; and Penny, by virtue of her virtuoso performance in “Serial Apist,” is invited to a sci-fi convention.
Season 10, Episode 07 – “The Veracity Elasticity”
In order to remain Sheldon’s roomie, Amy fibs about repairs being made to her apartment . Later, they present an episode of “Fun With Flags” in Penny’s apartment..
Season 10, Episode 08 – “The Brain Bowl Incubation”
A successful gene experimentation leaves Sheldon excited to procreate with Amy, and he pulls out all stops to get her on board. Meanwhile, Koothrappali is reluctant to reveal what the new woman in his life does for a living.
Season 10, Episode 09 – “The Geology Elevation”
A geologist coworker’s MacArthur Genius fellowship award leaves Sheldon stone cold jealous. Meanwhile, Howard stumbles upon a remote-control Stephen Hawking action figure that he invented. Hawking appears as himself.
Season 10, Episode 10 – “The Geology Elevation”
Two nerdy physicists share an apartment and an unlikely friendship with their beautiful neighbor with whom one of them is infatuated. Like the universe after the big bang, the show’s popularity expanded, thanks to breakout star Jim Parsons, along with the chemistry among the friends and the developing romance between Leonard and Penny. The addition of Melissa Rauch and Mayim Bialik in later seasons also enhanced the stories and relationships of the leads.
Season 10, Episode 11 – “The Birthday Synchronicity”
The Wolowitz baby arrives, while Sheldon and Amy celebrate Amy’s birthday.
Season 10, Episode 12 – “The Holiday Summation”
Sheldon and Amy visit Leonard and Penny for the first time since the holidays and share details about their terrible trip to Texas.
Season 10, Episode 13 – “The Romance Recalibration”
After a marital disagreement, Penny takes off for a spa weekend with Amy, and Sheldon steps in to play peacemaker for the squabbling newlyweds. Meanwhile, Howard and Raj do battle with a noisy floorboard in the baby’s room.
Season 10, Episode 14 – “The Emotion Detection Automation”
Sheldon learns about an MIT invention that can help read people’s emotions and decides to test it. Meanwhile, Leonard has trouble hiding his emotions when Penny announces her brother is going to visit; and Raj gathers former girlfriends to ask for their dating advice.
Season 10, Episode 15 – “The Locomotion Reverberation”
With Sheldon hindering progress on the guidance-system project, Leonard and Stuart figure the only way they can get back on track is to engineer a distraction by getting him tickets to a historic railroad. Meanwhile, Penny and Amy spirit away new-mommy Bernadette for a girls’ night out, leaving baby Halley in the hands of Raj and Stuart.
Season 10, Episode 16 – “The Allowance Evaporation”
Amy is incensed when she discovers Sheldon has shared intimate relationship information with people at the university; and Raj is knocked for a loop when his father stops sending financial support.
Season 10, Episode 17 – “The Comic-Con Conundrum”
Without financial backing from his father, Raj finds himself in a cash crunch and turns to Sheldon to help him get his head above water. Meanwhile, Penny considers crashing the guys’ annual Comic-Con getaway.
Season 10, Episode 18 – “The Escape Hatch Identification”
Leonard and Penny offer Sheldon’s old room to Raj after he moves out of his apartment.
Season 10, Episode 19 – “The Collaboration Fluctuation”
Raj moves in with Leonard and Penny and a period of adjustment begins for the three, while the usually self-centered Sheldon shows surprising interest in Amy’s work.
Season 10, Episode 20 – “The Recollection Dissipation”
Sheldon’s working overtime and pushing himself to the limit when he collaborates on projects with Leonard and Wolowitz, and another one with Amy, all on the same day. Meanwhile, Bernadette’s maternity leave is running out and she must face going back to work.
Season 10, Episode 21 – “The Separation Agitation”
Leaving baby Halley in day care proves to be tough for Bernadette after she starts back to work; and geologist Bert digs up a girlfriend, but some of his colleagues think she’s a golddigger.