It's the day of Leonard and Penny's formal wedding ceremony, but things have the potential to go horribly wrong because of all the interrelationships between the attendee ...

Howard passes along the fact that Colonel Williams wants to meet to discuss the guidance system to Leonard and Sheldon, the three and Raj who discuss amongst themselves t ...

With only two months to complete the contract for the Air Force, Howard, Leonard and Sheldon are working around the clock. Sheldon in particular is feeling sleep deprived ...

A burst water pipe leaves Amy's apartment uninhabitable for five weeks. Penny and Leonard offer Leonard's bedroom as a place to stay for that time, while Penny and Leonar ...

Sheldon and Amy are hitting obstacles in their five week cohabitation experiment, as Amy cannot put up with many of Sheldon's rigid rules, about which he will not negotia ...

Penny has been asked to appear at the Van Nuys Comic-Con for starring in the Serial Ape-ist movies. Leonard is able to convince her to make the appearance despite her hes ...

Sheldon and Amy seem to have found a comfortable emotional place in living together, they even hosting their latest webcast of Fun with Flags in their current abode of wh ...

Despite the parts that he doesn't like about it, Amy is able to convince Sheldon to take a skin sample from him so that she can develop a brain cell from a combination of ...

Bert in the Geology Department has just won a prestigious MacArthur grant, and with it $500,000 which need not be used for his research. Everyone around him is happy for ...

Amy tells Sheldon they need to remove some of Penny's things and bring some of his from the old apartment. Sheldon goes there and takes practically everything with no reg ...

It's around midnight. Bernadette has gone into labor, with Howard, Raj and Stuart rushing her to the hospital. News of the labor makes its way back to their friends. It's ...

It's early January, 2017, and Leonard and Penny are hosting a regular dinner for their friends, the first time they've gotten together since the holidays. Each group has ...

Penny laments not only that Leonard no longer does romantic things for her like he used to before and when they first got married, but that he doesn't even seem to try an ...

Sheldon is accused by his friends of being insensitive once again, this and most other times so accused because he doesn't read emotional cues in others. As Bernadette ha ...

The work on the guidance system is going smoothly enough, with the exception of Sheldon making one unnecessary suggestion after another just to satisfy his own sense of m ...

In the latest video chat Raj has with his father who still pays for Raj's every expense despite Raj having a job, Raj learns that Dr. Koothrappali has, in his own words, ...

Sheldon, Leonard and Howard are looking over Raj's finances now that he has made the decision not to live off of his father. Despite Raj holding a good and steady job, hi ...

Raj has posted on social media that he can no longer afford his apartment and is looking for a cheaper place to live. Independent of each other, both Howard and Bernadett ...

Raj has now moved in with Leonard and Penny. Instead of a roommate for both of them, what Raj becomes is Penny's closest girlfriend, with Leonard feeling left out. It's n ...

Much to Amy, Leonard and Howard's chagrin, Sheldon boasts that he can work on their two separate projects in the same time that the three of them are working on one. That ...

Bert announces that he has met who he believes is his soul mate, a woman named Rebecca. The gang invites Bert and Rebecca to dinner at Leonard and Penny's so that they ca ...

An event demonstrates to Sheldon that his cognitive abilities are weakening. This thought dismays him for many reasons, including the fact that his time to come up with a ...

Leonard, Sheldon and Howard, along with their closest friends and loved ones, are celebrating the near completion of the first phase of the military project, the three re ...

Amy has now started her summer research stint at Princeton. Much to Leonard's chagrin, he has reassumed many of the responsibilities for Sheldon that Amy had taken over w ...