Mark Cendrowski

Howard demonstrates a robotic arm, that he "borrowed" from the Jet Propulsion Laboratory. Penny comes to know of Sheldon's new friend Amy Fowler and asks him to take Amy on a date. To everyone's surprise, Sheldon announces his plans to conceive a progeny with Amy via in vitro fertilization. Meanwhile, Howard continues experimenting with the robotic arm and uses it as a massager... (More)

Mark Cendrowski

Sheldon determines that his best estimate for his life expectancy will cause him to miss by only a few years "the singularity ... when man will be able to transfer his consciousness into machines, and achieve immortality". He therefore changes his diet and starts to exercise in hopes of extending his life expectancy... (More)

Mark Cendrowski

Sheldon and Amy Farrah Fowler are very compatible with each other, as evidenced by how well they can play "counter-factuals", a game they invented requiring them to know what the other is thinking would be the answer to a question about "an alternate world that differs from ours in one key aspect" (Leonard flunks miserably when he attempts to play this game)... (More)

Mark Cendrowski

When the guys run into Howard's ex at the Cheesecake Factory, he ends up confronting his lingering feelings for her. He seeks help from Penny, who agrees on the condition that Howard reveal the reason behind his breakup. He confesses that Bernadette caught him engaging in cybersex with a fellow World of Warcraft player... (More)

Mark Cendrowski

When Amy Farrah Fowler decides to introduce Sheldon to her mother, it worries Sheldon. He still adamantly says that Amy his friend but not his "girlfriend". When Leonard reveals to him that he can't actually say that anymore, it freaks him out and he tries to "break up" with her. When she tells him it is only to please her mother... (More)

Mark Cendrowski

Raj's sister, Priya (Aarti Mann), visits and inadvertently causes trouble for the friends. She and Leonard apparently have a history, despite Leonard's pinky swear with Howard that they would not interact with her in deference to Raj. They hook up, but are discovered by Sheldon, who devises an elaborate lie to cover it up... (More)

Mark Cendrowski

When Howard attempts to recieve a high security clearance, his friends are interviewed by a formidable FBI agent checking into Howard's past. Raj and Leonard are pathetic durning their respective interviews (the latter trying and failing to ask her out by seeming "confidant")... (More)

Mark Cendrowski

Sheldon, Leonard, Raj, and Howard excitedly plan to attend a screening of Raiders of the Lost Ark that includes 21 seconds of never-before-seen footage. However, they delay reaching the theater, resulting in much complaining from Sheldon, which becomes worse when Wil Wheaton arrives... (More)

Mark Cendrowski

Leonard is flattered when he shows up at Penny's door and gets a kiss from Penny. Later, Penny informs him that her critical father Wyatt (Keith Carradine) is visiting, and she asks him to pretend that they're back together because he's the only boyfriend she's ever had that her father likes... (More)

Mark Cendrowski

Amy begins to have feelings for Penny's ex Zack, whom she meets in a bar on a night out with Penny and Bernadette. Amy and Sheldon later discuss her symptoms (elevated heart rate, clammy palms, dry mouth, and an involuntary "hoo!") and come to the reluctant conclusion that she is horny... (More)

Mark Cendrowski

The guys discover that Penny and her ex boyfriend, Zack, are back together and they take advantage of his lack of intelligence and make fun of him. After Zack finally realizes what's going on and storms out, the guys decide to apologize to him... (More)

Mark Cendrowski

Sheldon, Howard, and Raj are eating together in the Cafeteria when Leonard approaches them with an idea for a smartphone app that helps users solve Differential Equations. Leonard quickly recruits Howard, Raj, and Sheldon who recruited himself... (More)

Anthony Rich

Leonard, Sheldon, Howard, Raj, Amy, and Bernadette are invited to give a speech at the Institute of Interdisciplinary Study Symposium on the Impact of Current Scientific Research on Social Interaction. Amy reveals Penny as her best friend and invites her to come along as Amy's plus one... (More)

Mark Cendrowski

Sheldon gives a lecture in a class, as usual he makes his condescending comments. Meanwhile, the gang is enjoying the tweets of the people at Sheldon's lecture which are all negative towards Sheldon, then Sheldon arrives home and as usual expects that his lecture was positively monumental to his audiences lives... (More)

Mark Cendrowski

The gang are eating and chatting at the cafeteria, suddenly the President of the University; President Siebert (Joshua Malina ) approaches them and asks them to attend a fundraiser for the university. Sheldon refuses to go, so President Siebert threatens to blind him with a hot spoon if he doesn't... (More)

Mark Cendrowski

Howard and Bernadette just had sexual intercourse, after that Howard immediately prepares to leave, Bernadette feels cheapened by this and asks him to consider living together. Howard arrives home and as usual his overbearing mother; Mrs. Wolowitz annoys him with her rude comments, although this time Howard snaps and leaves the house... (More)

Mark Cendrowski

Sheldon is upset when he realizes Leonard is the center of their group of friends. When the gang starts hanging out at Raj's, Sheldon decides, on advice of Amy and Penny, to get a new group of friends, which consists of Kripke, Stuart, Zack, and LeVar Burton... (More)

Mark Cendrowski

Leonard and Priya is in bed together, Priya urges him to get contact lens as she claims he has beautiful eyes. Later at the Cafeteria, Howard offers to show Raj a magic trick, Sheldon intervenes and tells him he shouldn't be wasting his time with such trivial matters... (More)

Peter Chakos

Sheldon's World Of Warcraft account was hacked and his character was raided clean, the boys are determined to track down this hacker. Penny share some girl talk with Bernadette and Amy about Leonard and Priya. Meanwhile, Howard discovered the location of the Hacker; Todd Zarnecki. So, the boys travel to Carlsbad, California to confront him...(More)

Brian Greene is promoting his new physics book: The Hidden Reality, where he attempts to present complex physics issues in a manner understandable to non-scientists. Included in his audience are Amy and Sheldon who find his explanations to be humorous. As they listen to his presentation, Amy tells Sheldon a piece of gossip she got from Penny: Bernadette is thinking of breaking up with Howard...(More)

Sheldon barges into the toilet while Leonard is using the shower as he has drank a 32 ounce smoothie and needs to urinate immediately, Leonard discourages it and points out Priya is in the shower with him. Sheldon is angered by this because it is a violation of the Roommate Agreement, but he has no time to waste so he rushes over to Penny’s and urinate there. The following morning, Sheldon charges Leonard..(More)

Penny, Amy, and Bernadette are in the restroom; Amy, who is in a bathroom stall talks to Penny, who is in another bathroom stall. Amy explains that her trip to the bathroom has mostly been about excreting, but now she can socialize too. Penny however doesn’t enjoy this socializing activity too much as she presumably suffer...(More)

The gang (except Amy) is at the Cheesecake Factory. Penny asks Bernadette to take a table for her at the Cheesecake Factory, because she doesn’t want to bump into Priya. At the table Sheldon is drinking water only to be informed that it was already drank by Leonard. Sheldon then announces he will be dead because of the...(More)

Leonard, Sheldon, Howard, Raj and Priya are at The Cheesecake Factory, Penny comes over to take their order. Priya order the Shepherd's Pie and asks if he wants to share it with her. Penny discourages it as it contains milk and Leonard is lactose intolerant, she brings this to light in a mocking manner...(More)