AVAILABLE EPISODES
![The Big Bang Theory](https://dynaimage-uat-tbs.ids.turner.com/tbs/w_416/https%3A%2F%2Ftbs-nonprod.s3.amazonaws.com%2Fimages%2F2017%2F04%2Fbbt-s1e6-1600x900-1600x900_071420140200.jpg)
Penny hosts a Halloween party putting Leonard, Sheldon, Wolowitz and Koothrappali through a new test of their social skills.
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![The Big Bang Theory](https://dynaimage-uat-tbs.ids.turner.com/tbs/w_416/https%3A%2F%2Ftbs-nonprod.s3.amazonaws.com%2Fimages%2F2017%2F04%2Fbbt-s1e7-1600x900-1600x900_071420140201.jpg)
With Wolowitz AWOL with one of her friends, Penny's recruited to fill in for him on the guys' Halo team.
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![The Big Bang Theory](https://dynaimage-uat-tbs.ids.turner.com/tbs/w_416/https%3A%2F%2Ftbs-nonprod.s3.amazonaws.com%2Fimages%2F2017%2F04%2Fbbt-s2e16-1600x900-1600x900_071420140246.jpg)
Paintball leads to a squabble between Sheldon and Penny as well as romance between Howard and Leslie.
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![The Big Bang Theory](https://dynaimage-uat-tbs.ids.turner.com/tbs/w_416/https%3A%2F%2Ftbs-nonprod.s3.amazonaws.com%2Fimages%2F2017%2F04%2Fbbt-s2e17-1600x900-1600x900_071420140247.jpg)
The gang is thrilled when they see Terminator: The Sarah Connor Chronicles' Summer Glau is also aboard their train to San Francisco for a scientific symposium. Sheldon frets over having forgotten a paper he wants to present to George Smoot.
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![The Big Bang Theory](https://dynaimage-uat-tbs.ids.turner.com/tbs/w_416/https%3A%2F%2Ftbs-nonprod.s3.amazonaws.com%2Fimages%2F2017%2F04%2Fbbt-s2e18-1600x900-1600x900_071420140247.jpg)
Penny's business selling hair accessories out of her apartment gets out of hand when an over-caffeinated Sheldon takes charge.
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![The Big Bang Theory](https://dynaimage-uat-tbs.ids.turner.com/tbs/w_416/https%3A%2F%2Ftbs-nonprod.s3.amazonaws.com%2Fimages%2F2019%2F10%2FBigBangTheory-S12E273-LaureateAccumulation-1600x900.jpg)
Pemberton and Campbell charm America on a publicity tour, so Sheldon and Amy bring Nobel laureates Kip Thorne, George Smoot, and Frances Arnold to their side. Halley's fear of the dark leads to conflict for Howard, Bernadette and Stuart.
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![The Big Bang Theory](https://dynaimage-uat-tbs.ids.turner.com/tbs/w_416/https%3A%2F%2Ftbs-nonprod.s3.amazonaws.com%2Fimages%2F2019%2F10%2FBigBangTheory-S12E274-InspirationDeprivation-1600x900.jpg)
Amy has a meltdown due to the pressure associated with winning a Nobel Prize. Raj and Howard try to relive the good old days after Howard buys a scooter that looks like the one he had years ago.
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![The Big Bang Theory](https://dynaimage-uat-tbs.ids.turner.com/tbs/w_416/https%3A%2F%2Ftbs-nonprod.s3.amazonaws.com%2Fimages%2F2019%2F10%2FBigBangTheory-S12E275-DecisionReverberation-1600x900.jpg)
Raj is worried people won't take him seriously in his own field after publishing a paper that suggests he may have discovered alien life. Leonard wants to be the principal investigator on a plasma physics study.
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![The Big Bang Theory](https://dynaimage-uat-tbs.ids.turner.com/tbs/w_416/https%3A%2F%2Ftbs-nonprod.s3.amazonaws.com%2Fimages%2F2019%2F10%2FBigBangTheory-S12E276-PlagiarismSchism-1600x900.jpg)
Kripke has proof that Dr. Pemberton plagiarized his thesis, and Sheldon and Amy aren't sure they should turn him in or not. Howard is surprised to learn that Bernie wasn't the only waitress at the Cheesecake Factory who had a crush on him.
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![The Big Bang Theory](https://dynaimage-uat-tbs.ids.turner.com/tbs/w_416/https%3A%2F%2Ftbs-nonprod.s3.amazonaws.com%2Fimages%2F2019%2F10%2FBigBangTheory-S12E277-MaternalConclusion-1600x900.jpg)
Leonard is pleasantly surprised when Beverly comes to visit and she's genuinely kind to him, until he finds out the real reason she's there. Denise and Stuart overstay their welcome at the Wolowitz house.
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![The Big Bang Theory](https://dynaimage-uat-tbs.ids.turner.com/tbs/w_416/https%3A%2F%2Ftbs-nonprod.s3.amazonaws.com%2Fimages%2F2019%2F10%2FBigBangTheory-S12E278-ChangeConstant-1600x900.jpg)
Amy and Sheldon wait for the news. Howard and Bernadette leave their kids. Leonard and Penny keep a secret.
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About
Leonard and Sheldon are brilliant physicists, the kind of ''beautiful minds'' that understand how the universe works. But none of that genius helps them interact with people, especially women. All this begins to change when a free-spirited beauty named Penny moves in next door.