Mark Cendrowski

Sheldon gets in trouble with Amy when he isn’t impressed by her recent accomplishment, and Howard must come to grips with Bernadette’s dislike of children.

When Alex’s childhood dog passes away, Whitney suggests they adopt a dog together. However, the adoption process isn’t as easy as they’d hoped especially when dealing with pound owner Mrs….

When Stuart asks Amy out on a date, Sheldon must confront his feelings and consider where his relationship with Amy is going.

Leonard and Penny try hanging out as friends on a ’non-date’, but end up purposely ruining each others chances with perspective dates. Meanwhile, Sheldon enlists the help of Bernadette and…

Amy becomes heartbroken when she discovers that Penny and Bernadette went wedding dress shopping without her.

A cute comic book artist puts Leonard and Priya’s relationship to the test, while Sheldon tries to scare the guys for Halloween.

Sheldon and Leonard get invited to a party at Wil Wheaton’s house, and Howard gets an out-of-this-world opportunity.

Penny plays Matchmaker for Raj, which results in him finding a girl he is comfortable talking to.

Leonard and Amy get to know each other better, while Howard and Bernadette spend the weekend with Mrs. Wolowitz.

Penny is worried with how damaged her friendship with the guys will be in the aftermath of her sleeping with Raj while Sheldon becomes the leader of the paintball team.

A fight between Sheldon and Penny leaves Amy caught in the middle, while Leonard tries to spice up his long-distance relationship with Priya.

When Bernadette receives her PhD, Wolowitz feels emasculated. Raj and Leonard swap places and Penny does something she’s regrets.

Raj attempts to cure his social anxiety disorder while Penny uses Bernadette to spy on Leonard and his girlfriend.

When Leonard spends too much time in the shower with Priya, Sheldon charges Leonard with two violations of the roommate agreement. However, before he can get too far, Priya uses…

Sheldon and Amy decide to start several rumors about the others as a test. Meanwhile, Howard takes his relationship with Bernadette to even higher level.

Sheldon is baffled by Wolowitz’s magic trick. Meanwhile, Leonard realizes dating Priya may make it impossible to continue being friends with Penny.

Kate welcomes her younger sister Julia for a visit and doesn’t realize that her sister is all grown up. Larry and Connie decide to support each other at the bar.

Sheldon becomes concerned when everybody begins to hang out at Raj’s apartment and discovers Leonard is the center of the group.

As Wolowitz contemplates taking things with Bernadette to the next level, Leonard rekindles his relationship with Raj’s sister.

A wealthy donor to the university makes Leonard consider how far he’s willing to go for the sake of science.

Hoping it will make him a better teacher, Sheldon has Penny give him acting lessons. Raj has fantasies about a friend’s girlfriend.

Leonard’s idea for a smartphone app derails his friendship with Sheldon.

The guys find a ”super” use for Penny’s new boyfriend, Zack, when they enter a costume contest as the Justice League.

Amy finds she has sexual feelings for Penny’s ex, while Koothrappali and Wolowitz try to prove who would be the better superhero.

Penny asks Leonard to lie to her father, while Howard, Raj and Bernadette pull an all-nighter at a telescope.

While the guys camp in line for a long-awaited movie screening, Penny and Bernadette invite Amy to her first slumber party.

Sheldon’s answers during an FBI interview put Wolowitz’s security clearance in jeopardy.

Leonard keeps an affair a secret from Sheldon, Howard and Raj.

Leonard realizes he’s the only one without a girlfriend, while Sheldon wants to get rid of his.

An embarrassing secret of Wolowitz’s comes to light, while Sheldon and Raj have a small war at work.

The guys are concerned as Sheldon searches for an alternative to human companionship.

Realizing he will not live long enough to download his consciousness into a robot body, Sheldon tries to extend his life span.

Penny tags along on Sheldon’s first ever date; Wolowitz finds a new use for a robotic arm.

Leonard tells Penny about how he met Sheldon for the first time…and what happened to the elevator.

Leonard and Sheldon compete for the attention of a famous female physicist.

A fight between Leonard and Penny threatens their relationship, while Sheldon battles Wil Wheaton in bowling.

Sheldon’s friends come to his aid when his fear of public speaking stands between him and a coveted award.

When the guys find a ring from ”The Lord of the Rings” at a garage sale, it threatens to tear them apart.

While searching through an archaeological site in South America, Zack awakens the spirit of an ancient princess.

Leonard can only bring one guest on a trip to see CERN’s Large Hadron Collider (the world’s largest and highest energy particle accelerator) in Switzerland on Valentine’s Day.

Sheldon’s search for the answer to a physics problem leads him to work at the Cheesecake Factory with Penny.

Cody tries to find out who stole a valuable book.

When their apartment is robbed, Leonard and Sheldon turn to their friends to create a state-of-the-art security system.

Leonard is aghast to find out a secret of Penny’s: she believes in psychics. Meanwhile, Sheldon tries to assist Koothrappali in picking up a girl at a university mixer.

A Christmas visit from his mother has Leonard discovering she’s kept a lot of news from him that she shares with Sheldon and worrying if she’ll approve of his romance…

Penny gets help from Sheldon in order to understand what Leonard’s work is, while Wolowitz develops a jealousy when Leonard starts hanging out with his new girlfriend.

After he’s humiliated on National Public Radio, Sheldon vows to destroy Kripke, while Wolowitz tries not to destroy his new relationship with Bernadette.

With Leonard, Howard and Raj away camping in the desert, an injured Penny has only Sheldon to rely on.

Zack and Cody receive a $200 check from their parents for their 16th Birthday, but have an argument about how to spend it. During the argument, they both wish they…

A squabble between Leonard and Penny sees Sheldon playing mediator, though out of his own incovenience from the sitiation rather than altruism.

Sheldon becomes Leonard’s teacher in order to understand football, while an incident with flying a kite threatens Howard and Raj’s friendship.

After overhearing that Wil Wheaton is entering a trading-card competition, Sheldon decides to enter it himself. Meanwhile, Penny sets up one of her friends on a date with Wolowitz.

Jordin Sparks comes aboard the S.S. Tipton and Zack, Cody and Marcus try to write a song for her. Meanwhile, as one of London’s Yay Me! contest, one of her…

Raj must find a new job or be sent back to India, but Sheldon has a solution, which leaves Leonard and Penny dealing with Howard as a third wheel.

Howard and Raj visit a Goth nightclub to pick up women while Sheldon attempts to build a better Penny using chocolate-based behavior modification.

Leonard and Penny struggle to recover from an awkward first hookup while Sheldon and Howard stake their best comic books on a bet to determine the species of a cricket.

When Sheldon learns the guys tampered with his expedition data he got from the arctic, he leaves to Texas in disgrace. This results in the guys following him, which threatens…

Justin’s new vampire girlfriend Juliet gets the Russos to change their lifestyle by adding healthy foods and exercise. However Alex is concerned about Juliet’s true intentions for Justin when she…

The guys’ plan to work over the summer at the North Pole makes Penny revaluate her feelings for Leonard.

Penny’s second date with Stuart sees her making a comment that gives Leonard new hope for a relationship with her. Wolowitz realizes there’s a crucial error in a NASA project…

Leonard and Koothrappali escort a heartbroken Wolowitz to Las Vegas, and Sheldon becomes locked out of his apartment and must stay with Penny.

A fellow comic book enthusiast’s hitting on Penny leads to Leonard and Howard going to a bar’s Ladies’ Night.

Penny squares off with a new beautiful female neighbor who may become the building’s ”new Penny.”

Leonard, Sheldon and Wolowitz are ecstatic to learn that a famous science-fiction actress (Summer Glau) is on board the train they are taking to San Francisco.

Audrey discovers that Russell is really a closet Broadway-musical fan, and uses this knowledge to her advantage by blackmailing him for tickets. Meanwhile, Adam and Jennifer decide to take dancing…

A paintball game leads to a fight between Sheldon and Penny, and romance for Leslie and Wolowitz.

Leonard and Penny are drawn together after a disastrous visit from Leonard’s mother.

Sheldon’s solution to Penny’s financial difficulty leads to a confrontation between Leonard and Penny’s ex-boyfriend.

Sheldon creates a scientific procedure for making friends.

Penny’s criticism of Wolowitz’s romantic life pushes him into depression and AWOL for a fighting robot battle the rest of guys are depending on him for.

Penny starts dating Leonard’s handsome colleague; Leonard and his friends are tortured by Sheldon’s obsession with gift-giving etiquette.

Leonard asks Penny for advice when his new relationship starts moving too fast.

Alex tries to save the taxi that she was born in. Meanwhile, Justin sets out to find his birthplace.

Sheldon is thrilled when Leonard starts dating a woman who meets Sheldon’s stringent standards.

Leonard inadvertently steals away the new woman Wolowitz thinks is the love of his life.

When Sheldon bans Penny from the apartment for numerous minor infractions, she decides to retaliate.

Sheldon and the gang are confused when a young grad student is attracted to him.

Leonard and his friends stage an intervention to force Sheldon to face his fear of driving.

Raj gets an inflated ego and makes a play for Penny after being referenced in a magazine article.

Sheldon creates a monster when he introduces Penny to online gaming.

Justin and Max steal Alex’s diary only to have it stolen again by Gigi, Alex’s arch nemesis. In an attempt to recover the diary, the brothers accidentally place Gigi inside…

A jealous Leonard reacts to Penny’s new guy by rebounding with Leslie.

Penny’s first date with Leonard goes awry; Penny finds Sheldon to be an unwilling confidant.

A girl that Cory’s interested in turns out to be the daughter of another ambassador from a country that’s a sworn enemy of Meena’s native Bahavia. Somehow, the President gets…

Alex wants an easier way to complete her Art History assignment, so she brings historical masterpieces to life to help her complete her worksheet. Meanwhile, Jerry and Max use a…

Justin casts a spell on himself to impress a girl, and ends up being the baseball team’s star pitcher. When Alex finds out, she uses it to become the catcher’s…

Penny’s break-up spurs Leonard to summon the courage to ask her out, and each goes to Sheldon for advice on their upcoming date.

Adam and Jennifer are looking to move and find an apartment in the same Building as Audrey and Jeff. Jeff and Audrey agree to support them to the board, only…

Penny wants to throw a surprise party for Leonard, but Sheldon’s indulgence at an electronics store throws her off-track.

The rest of the gang fall for Sheldon’s twin sister, and Leonard’s plan to win her heart is derailed when Sheldon declares he’ll be the one to decide who can…

When delivery of another collectible leads to Penny’s lashing out at Leonard, he decides it’s time to give up his habit, much to his friends’ protestation.

Sheldon finds himself booted from the gang’s Physics Bowl team and replaced with Leslie, so he forms his own team, hoping to prove he’s superior.

With Sheldon rattled over meeting Dennis, a 15-year-old physicist who’s smarter than he, Leonard helps him look for a way to debunk Dennis’s research.

Alex and Justin go to a summer school for wizards and Alex has a hard time fitting in. Back at home, Jerry and Max try to prove their manhood.

Alex may have her chance to shine when she finds out Dr.Evalinie’s plan to take away Justin’s powers during a tournament at the school.

With his friends knowing how sour he acts when sick—and avoiding him as a result—Sheldon is nursed by Penny, who hasn’t a clue what she’s in for.