Penny and Bernadette attend a pharmaceuticals conference, where Bernadette's business rival Danny tries to recruit Penny. Bernadette is offended that Penny is considering the offer. At the meeting with Danny, Bernadette steps in to say Penny is the best saleswoman she knows and Penny agrees to keep working for Bernadette. Meanwhile, the rest of the gang does simple behavioral experiments on the Wolowitz children using a book Sheldon found. Leonard is shocked that his childhood was filled with these experiments; although his mother remembers that time with him fondly, she admits the experiment with him is not over. Raj figures Amy planted the book to get Sheldon to like babies, though Sheldon later states he would be open to having kids.

Season 11 The Big Bang Theory Episodes Future episodes Series 11 Leonard Penny Howard Sheldon Raj Bernadette Amy Stuart Unaired Episodes Articles With Photos 2017 Episodes 2018 Episodes Baby Wolowitz Howardette Lenny Shamy Future season Confirmed Seasons Howard-Bernie Married Howard-Bernadette together Howard-Bernadette Married Halley Wolowitz Leonard-Penny Together Leonard & Penny Married Penny Hofstadter Penny has long hair Raj Talks Without Alcohol 2017 2018 Marriage Arc Marriage Proposal Possible pregnancy Leonard-Penny married Leonard-Penny possibly having children Season 11 episodes Series 11 Episodes Winter Episodes Fall episodes Fall 2017 Winter Winter 2017 Spring Episodes Spring Spring 2017 Leonard & Penny Seasons Second Wolowitz Baby Halley's sibling Halley Bernadette pregnant Possible holiday episode Ira Flatow Professor Proton Wil Wheaton Kripke Barry Kripke Ruchi Zack Johnson Elopement Wedding Plans Barry Ramona Nowitzki Colonel Richard Williams Spring 2018 New kids Bestie Bridesmaids Maid of Honor Best Man Janine Davis Ramona Colonel Williams Beverly Air Force Shamy Engaged Wil Sheldon's Women Nell Nell-Oliver Raj's Women Love Interests Girlfriends Ex-girlfriends Raj's exes Raj's ex-girlfriends Oliver Baby Wolowitz II Baby Bump Howard-Bernadette Sheldon-Amy Together Penny-Leonard Sheldon-Amy Raj single Penny married Leonard-Penny Sheldon-Amy Engaged Raj has a date Raj's women Leonard's Mother Bernadette's second baby Wolowitz son Sheldon and Amy's wedding Bill Gates Bachelor Party Bachelorette Party


Sheldon needs half a billion dollars to prove his latest concept of string theory, which the University cannot afford to fund. Crowdfunding and selling some of his most valuable comic books to Stuart give him a small start. When Raj mentions gambling in Las Vegas, Sheldon goes there but is caught calculating odds by security before he can make any bets. Meanwhile, Amy takes Penny and Bernadette shopping for her wedding dress. She loves an old-fashioned one that the other girls admit that they find ugly, though Penny assures Amy she can make her own decisions about her wedding. Sheldon, however, comes home and sees Amy in the dress and loves how she looks.
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