Account Help Sign Out. What's New. Leonard and Amy help Sheldon cope with the shame he's feeling after his accidental contribution to science is disproved. While Sheldon is away, everyone gathers to decorate the Christmas tree and imagines what their lives would be like had they never met him. When Penny's big acting break on "NCIS" is a bust, Leonard struggles to help her, which prompts Penny to ask him a bold relationship question.
When Sheldon is forced to take a vacation, he tries to relax but instead spends a lot of time with Penny after she quits her job. When the guys can't get Comic-Con tickets, Sheldon decides to hold his own convention and ends up spending a wild night with James Earl Jones. Amy persuades Sheldon to join her -- along with Howard and Bernadette -- for a romantic weekend in Napa Valley to celebrate Valentine's Day.
When Leonard buys a table, it causes Sheldon to reevaluate the changes in his life. Meanwhile, Wolowitz is offered a chance to go back into space.
Bernadette tries to make peace between Howard and Sheldon by having them travel together to Houston in an attempt to mend their friendship. When Sheldon visits his mom, he's forced to confront a new reality. Meanwhile, Raj's murder-mystery party starts some fights within the gang. While Raj is wracked with guilt over dating two women at the same time, Penny wrestles with whether to take a role in a cheesy movie. Sheldon faces a personal crisis after deciding he's wasting his time with string theory.
Meanwhile, a double date ends in embarrassment. Leonard tries to help Sheldon free his mind by reinstating "Anything Can Happen Thursday," and Raj seeks Howard's help to prepare for a date.
Proton helps Sheldon cope with grief, while Leonard turns a relationship milestone into a competition with Penny. A horrible day at work prompts Penny to reevaluate her life choices. Meanwhile, Howard and Bernadette struggle to care for bedridden Mrs. With his entire world changing around him, Sheldon is forced to confront an uncertain future.
Meanwhile, Raj and Emily take things to the next level. As the gang deals with personal and professional ups and downs, Penny tries out a new career path in between relationship hiccups with Leonard. Sheldon is ready to come home after an incident on the train, so Amy and Leonard pick him up in Arizona.
Penny interviews at Bernadette's company. Sheldon becomes a junior professor, but he's required to teach a class. Amy enjoys being in the middle when Penny and Bernadette have a disagreement. Sheldon and Amy outscore Leonard and Penny on a compatibility test. Raj's girlfriend, Emily, finally meets Penny. Meanwhile, the guys consider investing in Stuart's comic book store.
The girls head to Vegas for the weekend, but Penny spends her time working instead of having fun. Back at home, the guys try to invent a hoverboard. Sheldon and Raj test whether they could survive a dark-matter research expedition in a salt mine.
Leonard and Penny bicker about money. A doctor mistakes Penny's flirty sales pitch for attraction, while Amy and Bernadette debate whether female scientists should use their sex appeal. Sheldon panics when the girls decide to recreate prom night on the roof of his building, thinking Amy will be expecting him to make a move. A distraught Sheldon tries to talk Leonard out of getting minor surgery.
Meanwhile, Raj's parents announce that they're getting divorced. A professor's death prompts Leonard, Howard and Raj to reflect on their own work. Bernadette finds out how her co-workers really feel about her.
Raj swoops in to help Leonard and Howard deal with a work emergency. Amy throws an authentic Victorian Christmas party, irritating Sheldon. Leonard and Sheldon learn a lesson about compromise when Penny and Amy take them shopping for dresses.
Howard tries to distract a nervous Raj. Sheldon enlists his friends to annoy him, hoping it'll put him in the right state of mind to make a breakthrough in his dark matter research. Sheldon and Leonard deal with a rude commenter after they publish a physics paper online.
The girls take an embarrassing trip down memory lane. Stuart reopens the comic book store, Penny tries to help Sheldon stop dwelling on things and Howard receives some shocking news.
Sheldon and Penny try out an experiment that supposedly makes people fall in love. The rest of the gang spends the evening at an escape room. Amy is upset when Sheldon applies to be part of a one-way mission to colonize Mars. A magazine fails to give Leonard credit for the paper he co-wrote with Sheldon, and they bicker during a dinner at Mrs. Wolowitz's house. At home, Howard and Bernadette argue about "Doctor Who. Sheldon and Amy make a breakthrough in their relationship while building a blanket fort together.
Penny appears on Wil Wheaton's podcast. Penny thinks about giving acting another try. Leonard is scheduled to give a commencement speech at his old high school, but his flight gets canceled. Raj can't get his toy helicopter to work. Sheldon and Leonard's mothers butt heads when they finally meet. Bernadette demands that Howard do his fair share of the housework. After Sheldon hurts Amy's feelings on the anniversary of their first date, she decides it's time to reexamine their relationship.
Adulthood continues to catch up to the whole gang and their relationships take new and exciting steps, even as Sheldon tries to resist big changes. Leonard's confession to Penny on their big day in Las Vegas creates a rift between them, while Sheldon and Amy also hit a bump in their relationship. Leonard meets up with Mandy as he and Penny each face fears about their relationship. Sheldon shoots an angry episode of "Fun with Flags.
Raj and Howard plan a bachelor party for Leonard, but just getting there will be an adventure. The girls have a bachelorette party at Penny's place. After learning that Leonard and Penny will move in together, Sheldon tries to emotionally travel in time to , before he knew Leonard, Penny and Amy. The guys take up fencing in an effort to get more exercise. Stuart tries to figure out how to get more girls to come to his store. Sheldon and Leonard need to find liquid helium quickly when Swedish scientists set out to prove their hypothesis.
Amy tries a dating app. Sheldon gets emotional during an interview with Wil Wheaton for a "Star Trek" documentary. Bernadette wants to start renovating Howard's mom's house. Penny, Bernadette and Leonard spy on Amy's date. Howard and Raj help Sheldon place an online ad to find a new girlfriend.
Amy and Sheldon go to the aquarium together as friends. Howard reluctantly agrees to volunteer at a soup kitchen. Penny and Leonard host Thanksgiving. Sheldon gets a song stuck in his head but can't figure out what it is. Howard and Raj go overboard when they learn that their band has a fan.
Sheldon has to decide between spending time with Amy on her birthday and attending opening night of "Star Wars: The Force Awakens" with the guys. Penny uses Leonard to make a sales pitch to a psychiatrist. Sheldon and Raj discover an asteroid.
Stuart moves out of Howard and Bernadette's house. After being annoyed by sick Sheldon, everyone goes to Las Vegas to get away from him. Sheldon learns the value of empathy and apologizing.
Meemaw comes to visit, but things don't go well when she meets Amy. Raj meets a girl he likes, prompting him to ponder his relationship with Emily. Leonard and Penny start to feel old.
Howard freaks out when he hears big news, so the boys take him to a karaoke bar to calm him down. There, they come up with a new moneymaking idea. Sheldon is reluctant to celebrate his birthday due to a bad childhood experience, but gives in when Amy and the others plan a big party for him. The guys attempt to patent their idea but learn that the financial details will be sticky.
Raj asks the girls for advice about Emily. Amy buys Sheldon a new laptop, then learns something unusual about him. Howard and Leonard lie to their wives to see a screening of "Suicide Squad. Amy, Penny, Leonard and Sheldon exchange secrets on a weekend trip to a cabin in the woods. Raj gets too involved in Bernadette's personal life. A trivial disagreement between Leonard and Sheldon before a "Game of Thrones" viewing party devolves into a huge argument involving everyone.
Sheldon stays behind with Bernadette while everyone else goes to a wine tasting party. Raj gets into some hot water when he brings Claire along. Leonard has Penny pick up his mother from the airport, and the two women struggle to make a connection. Sheldon hires Stuart to spend time with Amy. Leonard and Penny plan a second wedding for friends and family, but it creates parental strife. Howard thinks the government is after Raj and him.
In Season 10, a wedding, a baby, a government assignment and some new living arrangements will take the group into uncharted territory. It's an uncomfortable wedding day for Penny and Leonard when it appears that his dad and Sheldon's mom may have hooked up and Penny's family arrives.
Air Force Col. Williams comes to see Howard about the quantum gyroscope. Bernadette is furious that someone at work has blabbed about her condition. Bernadette confides in Raj she's not sure about being a mom. When Penny goes with Amy to Bert's party she's shocked to hear about Amy's reputation.
When Amy must leave her flooded apartment for weeks the logical thing to do is move in with Sheldon. Only Raj knows the sex of the Wolowitz baby. Penny and Sheldon bond to complain about Amy and Leonard. While Howard and Bernadette plan a babymoon, Raj and Stuart take over their hot tub. Penny is asked to sign autographs at a local fan convention, but it's Leonard who's the big hit. Sheldon and Amy host their first party together. Sheldon and Amy return in "Fun with Flags. While working on a bioengineering project with Amy, Sheldon decides he wants them to have a baby.
Raj is attracted to the office cleaning lady. Sheldon has a hard time getting past his jealousy when Bert wins a huge grant. Howard's remote control Stephen Hawking raises questions, and eyebrows. Leonard and Sheldon go to war over dividing up their stuff. Raj and Stuart are in a frenzy trying to be the most helpful to Howard and Bernadette. Amy's annual birthday ritual is interrupted when Bernadette goes into labor.
The gang reflects on how much their lives have changed -- except for Raj. After the holidays Sheldon and Amy recall their trip to Texas to see his mother, and Leonard and Penny relive their argument over a Christmas tree. Leonard and Penny turn to Sheldon and Amy for relationship advice.
Raj and Howard need math and science to fix a squeaky floor in the baby's room. Sheldon attempts to gain empathy and insight from an emotions reader. Raj gathers all his old girlfriends for a focus group to see what went wrong. Leonard gives Sheldon a train experience holiday to get him out of the way so he and Howard can finish the project, then discover they need him back.
Amy feels Sheldon doesn't understand relationships when he blabs intimate information. The gang thinks Raj is too financially dependent on his father. When Raj needs to move into a cheaper place, the gang offers help, then Beverly puts her own analytical spin on everyone's relationship issues.
Penny and Raj get along great when he moves in, leaving Leonard feeling like a third wheel. Sheldon and Amy's professional and personal lives collide. After working on two projects at once, Sheldon finally crashes and can't remember the night before. Bernadette gets emotional about returning to work. Bert has a hot new girlfriend. Comedy , Sitcom. No Free Trial. Highest quality. Watch with Watch on Xfinity Watch Now. High quality. Fowler away with magic tricks, Sheldon has no choice but to bond with Mrs.
Meanwhile, Raj and Anu attempt to get physical. G Sheldon and Amy are devastated to learn from a Russian paper that Super-Asymmetry has already been discovered and disproven. G Sheldon and Amy are still down about their theory being disproved, but a VHS tape from Sheldon's past inspires him not to give up.