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, ...

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 ...

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 ...

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 ...

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 ...

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 ...

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 ...

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 ...

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 ...

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 ...

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 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 ...

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 ...

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 ...

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 ...

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 ...

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 ...

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 ...

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 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 ...

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 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 ...

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 ...

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 ...

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 ...

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 ...

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 ...

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 ...

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 ...

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 ...

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 ...

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, ...