Sheldon feels slighted when Professor Proton seeks advice from Leonard instead of him, and he seeks revenge by befriending a rival science TV host, Bill Nye. Meanwhile, Raj becomes jealous when Howard crashes "girls' night."Watch Now:Amazon
Sheldon faces a crisis of confidence when he is forced to work with his nemesis, Barry Kripke; Raj and Howard buy expensive action figures of themselves.
When Leonard is considered for an exciting research opportunity, Sheldon becomes jealous and tries to scare him into backing out. Meanwhile, Raj's relationship with Lucy is strained when he tries to get her to meet his friends.Watch Now:Amazon
After Amy ruins one of Sheldon's favorite movies – Raiders of the Lost Ark – he gets defensive, seeking revenge. Meanwhile, Leonard discovers a way to get Penny to do anything; and Raj and Stuart create online dating profiles.Watch Now:Amazon
Sheldon must decide how much "Amy time" is too much after she takes a job at his university, and their relationship is put to the test. Meanwhile, Howard finds himself sleeping on Raj's couch after a fight with Bernadette.Watch Now:Amazon
In order to continue living with Sheldon, Amy lies to him about repairs being made to her apartment and they host an "on location" episode of "Fun With Flags" in Penny’s apartment. Also, Leonard lets Penny decorate Sheldon’s old room after he learns that she has been secretly moving Leonard’s collectibles into storage.Watch Now:Amazon
A game threatens Sheldon's relationship with Stephen Hawking; Penny secretly signs up for a college class.
Dave is thrilled when Calvin invites him golfing, confident that it represents progress in their relationship, but Calvin may have another motive. Also, Gemma and Tina team up to pull off an unforgettable surprise for Malcolm, Marty and Grover.Watch Now:AmazoniTunes
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.
After he's humiliated on National Public Radio, Sheldon vows to destroy Kripke, while Wolowitz tries not to destroy his new relationship with Bernadette.
When Leonard buys a dining room table, Sheldon re-evaluates the changes in his life; Bernadette is torn when Wolowitz gets the chance to go back to space.
Sheldon must learn how to relax when he is forced to take a vacation; Leonard tries to support Penny after she quits her job; Bernadette needs to replace one of Howard’s comic books.
Penny buys Leonard and Sheldon “Star Trek” collectibles as a thank-you, leading Sheldon to be haunted by Mr. Spock. Meanwhile, Raj decides he has met the “Future Mrs. Koothrappali” after his parents set him up on a date.Watch Now:iTunes
When Calvin and Dave get shown up by Gemma and Marty at a local bar's trivia night, the pair hatch a plan for a do-over to redeem themselves. Also, a frustrated Tina decides to take matters into her own hands in order to finally meet Malcolm's girlfriend, Sofia.Watch Now:AmazoniTunes
Leonard and Howard turn to Raj for help in dealing with a work emergency when they nearly come to blows after blaming each other for a potential disaster at the university. Amy throws an authentic Victorian Christmas party, while Sheldon seeks revenge on her for making him celebrate the holidays.Watch Now:iTunes
Dave is eager to take on a bigger role in the community and prove himself to Calvin; Calvin's reaction makes it clear that, while the relationship between the two families has grown, the friendship between Calvin and Dave needs more time.Watch Now:AmazoniTunes