Amy has broken up with Sheldon because she can no longer tolerate his insensitivity to her needs, while Leonard and Penny have moved in the other direction, Penny who can ...

Leonard and Penny try to work through their marital issues. Meanwhile, Sheldon films a special episode of Fun with Flags after his breakup with Amy, and Bernadette feels ...

Because Leonard and Penny eloped, neither got a bachelor or bachelorette party before their marriage. As such, Howard and Raj, with Penny's help, kidnap a willing Leonard ...

Leonard and Penny finally move in together leaving Sheldon very upset with this big change in his life and wishing he could go back to a time when he had no emotions in 2 ...

Bernadette, through a gift to Howard, indirectly gets Leonard and thus the guys to think about getting more exercise in their lives. All things considered, they decide to ...

Leonard and Sheldon learn that a Swedish scientific team has read their paper and is trying to beat them in completing the experiment to prove or disprove their hypothesi ...

Sheldon is excited to learn through his friend Wil Wheaton that Adam Nimoy, the son of Leonard Nimoy, Sheldon's hero, is making a documentary on the character of Mr. Spoc ...

Catching Amy kissing another man, Sheldon realizes that Amy has indeed moved on from him. As such, he decides to move on from her. As they were the ones who found Amy, Sh ...

On Thanksgiving, Sheldon and Amy try to spend time together as friends and go to an aquarium, Howard reluctantly agrees to volunteer at the soup kitchen with Bernadette, ...

Sheldon doesn't realize that he's humming until Leonard points it out to him. After that, Sheldon, and by association everyone around him, descend into madness in Sheldon ...

Professor Proton visits Sheldon in a dream and gives him advice about whether to go see the new Star wars film or spend the time with his newly reunited girlfriend Amy on ...

With Amy away at a convention, Sheldon hangs out with the friend with the best offer, which happens to be Raj who has time booked in the telescope room searching for rogu ...

Leonard, Penny, Howard, Bernadette, Raj and Emily are all mad at Sheldon because while they all tried to help and comfort him when he had the flu, he treated them all ins ...

Meemaw comes to visit her Moonpie. In other words, Sheldon's grandmother, Constance, comes for a visit. Although it may seem to Sheldon that her visit is purely a want to ...

Each couple has its own Valentine's Day plan, which don't turn out quite the way each intends. Leonard and Penny have dinner reservations. It isn't the one hour wait they ...

Bernadette tells Howard that she is pregnant. After the initial excitement, Howard gets an anxiety attack over one issue after another about the problems that will arise ...

Sheldon's birthday is approaching, and Amy wants to throw him a party despite he not ever having wanted a birthday party in the past. When Amy, Leonard, and Penny learn t ...

Alpha Emily continues to stalk, hunt and control Rajesh, over the objections of the new blonde barista. Meanwhile, Sheldon, Leonard and Howard REALLY need legal counsel t ...

Leonard and Howard have started working on the prototype, and accept Penny and Bernadette's offer to help. The boys leave the girls in the lab while they need to go to th ...

Sheldon has been spending time in the virtual wilderness ever since Amy showed him a scientific study that proves spending time in the great outdoors significantly improv ...

Leonard's mad at Sheldon for having to attend yet another useless quarterly roommate agreement meeting, on which Penny falls on Sheldon's side in wanting to keep the peac ...

Penny has received tickets to a wine tasting, and has invited all her friends to go with her. Everyone accepts except Sheldon, who has no interest, and Bernadette, who ca ...

Leonard's mother has come for a visit. While Leonard wants to avoid her at all cost, Penny wants truly to bond with her despite the less than happy relationship Leonard h ...

When she finds out that Beverly was secretly hurt by not being invited to their wedding, Penny makes the unilateral decision to hold another non-legal wedding ceremony to ...