Bernadette and Wolowitz leave their kids for the first time; Penny and Leonard try to keep a secret; Sheldon and Amy stick together; and Koothrappali makes a new friend, as the gang travels together into an uncharted future.Watch Now:Amazon
After a successful experiment combining their genes, Sheldon will stop at nothing to convince Amy they should procreate. Also, Koothrappali is embarrassed to tell the gang what the new woman he’s dating does for a living.Watch Now:Amazon
Sheldon attempts to build a nuclear reactor. Also, a university cocktail party gets heated when Dr. Sturgis’ colleague, Dr. Linkletter, flirts with Meemaw, and Georgie is heartbroken when he learns Veronica has a boyfriend.Watch Now:Amazon
Trouble arises when Amy learns Sheldon has applied for a one-way mission to colonize Mars. Also, a trip to the pet store ends in a fight for Sheldon and Amy, Leonard surprises Penny with a very “adult” purchase, and Raj is caught snooping in Emily’s apartment.Watch Now:iTunes
Amy's desire to have an intimate night with Sheldon on her birthday is interrupted by Bernadette going into labor.
Sheldon gets into trouble with fellow child genius Paige at the science museum. Also, George Sr. is forced to play therapist to Paige’s bickering parents, and Mary, Georgie and Missy help Meemaw with a garage sale.Watch Now:Amazon
When Sheldon learns that people with stunted childhoods can turn into social outcasts, he tries to act like a kid. Also, Meemaw and Dr. Sturgis’ relationship is tested when she teaches him how to drive.Watch Now:Amazon
Leonard and Wolowitz try to distract Sheldon when he slows the progress of their guidance system. Also, Penny and Amy take Bernadette out for the night, leaving Raj and Stuart to care for baby Halley.
Amy has a formal date which Leonard, Penny and Bernadette secretly spy on. Sheldon has Howard and Raj help him find a new girlfriend since they found Amy for him.
The gang finds out Wil Wheaton hosts a celebrity Dungeons and Dragons game involving William Shatner, Joe Manganiello, Kareem Abdul-Jabbar and Kevin Smith. Deception and betrayal are the path to make it to the one open seat.
When Leonard and Sheldon are invited to speak at UC Berkeley, they take a detour to try to meet an idol. Also, when Bernadette and Howard battle over the fate of his Doctor Who TARDIS, Raj and Amy offer to settle the dispute with a game of ping pong.Watch Now:iTunes
Sheldon and Bernadette spend a night together while the rest of the gang goes to a wine tasting party, but things get uncomfortable for Raj when Zack also attends and takes an interest in Claire.
Sheldon is thrilled when his Meemaw comes to visit, but his excitement quickly fades when she butts heads with Amy. Also, Raj meets a new girl at the comic book store who makes him question his relationship with Emily.
Dr. Sturgis is furious when Sheldon accuses him of plagiarism. Also, Mary sets out to find a “girl trophy” for Missy’s end-of-season baseball ceremony, and Georgie has an awkward run-in with Veronica while on a date with his new girlfriend, Jana.Watch Now:Amazon
Everyone must choose sides when a small argument between Leonard and Sheldon erupts into a heated fight during a group get-together.
After more than nine years together, the gang finally celebrates Sheldon’s birthday, surprising him with a special guest.