Howards's nerd hobby gets him into money troubles. Sheldon is forced to work with Kripke while in competition with Kripke, ends up spreading rumors about his sexual relationship with Amy. Howard and Raj get action figures of themselves that cost 1000$.
The guys have a road trip in order to attend to a comic book convention, dressed as "Star Trek: The Next Generation". Stopping to take some photos in costume, Leonard's car is stolen. Meanwhile the girls are at home trying to figure out a comic book.
Sheldon gets all the guys before the Human Resources Department when he tries to talk to Alex about her advances to Leonard. Alex's actions also make Penny feel insecure.
Guys plan to play Dungeons and Dragons, but girls are not invited, which causes arguments among them and the girls. After playing for some time at the apartment, the girls show up dressed sexily for a girls' night out and Raj goes with them to the nightclub. After striking out with a woman at the bar, Amy and Raj get to know each other better.moreless
Howard and Bernadette have a tense dinner with both of her parents. The subject of Mr. Rostenkowski's weekend fishing trip comes up and Howard is hooked into going with him. The guys visit Penny to learn all about fishing since she used to go with her dad. Sheldon shows up at Amy's apartment to find his girlfriend sick. After intitially rejecting her request, Sheldon stays to take care of Amy the way his mother took care of him, sometimes a bit initimately.moreless
Howard prepares to finally move out of his mother's house and in with Bernadette but it proves to be kind of difficult. Amy gets mad at Sheldon for taking Wil Wheaton's side and not hers, so he turns to Penny for advice.
Taking leaps from the start of the season, this episode showcases the heights of Sheldon's eccentricity and his state of friendship with Stephen Hawking. Penny treading the community college road. Leonard being absolutely crazy about Penny's educational chosen path. Raj coming out of his introvert shell and giving a taste of his wit and Howard giving his insight on the current happenings with a Stephen Hawking impersonation and doing his Indian Guy accent.moreless
Howard is offended when his return from space is met with little fanfare but he gets an even bigger surprise at home. Game Night turns into a battle royale between Penny and Sheldon.
Sheldon hires an assistant. Amy gets incredibly jealous of Sheldon having a female assistant, but Alex is actually more interested in Leonard. Meanwhile, Wolowitz' return from space has been delayed a week and he starts to lose his mind because of it.
Sheldon once again has to keep a secret when he learns Leonard and Penny are going to break up. Howard keeps getting teased by his fellow astronauts in space.
Sheldon faces a crisis of conscience after breaking a Star Trek toy given to him by Penny. Meanwhile, a lonesome Raj is smitten after a date set up by his parents.
Sheldon is forced into altering his precious schedule after his barber falls ill. Meanwhile, the training required to be an astronaut has Wolowitz wondering if he has the right stuff.
When a new office space is made available, Sheldon goes head to head with his nemesis, Kripke, for the right to move in. Meanwhile, Penny is unsettled by painting given to her by Amy.
Forced to use his vacation time, Sheldon dabbles in biology in Amy's lab. Bernadette reveals to the girls that her father wants her to make Howard sign a pre-nup.
Leonard can't take Sheldon's continued selfishness and agrees to dissolve the Roommate Agreement. Howard wants to have a cool nickname for when he's an astronaut.
Leonard and Penny create lists of 'bugs' in their relationship in an attempt to strengthen it. Meanwhile, Sheldon and Amy create a YouTube video series called Fun with Flags, and Raj develops an unhealthy attachment to Siri on his iPhone.
Sheldon finds himself in hot water when he doesn't appreciate Amy's recent accomplishment. Howard discovers Bernadette doesn't interact well with children.
Sheldon finds himself jealous when Amy goes on a date with Stuart. The other guys can't resist the allure of the latest collectable card game expansion pack.
Sheldon is miffed that Leonard plans to attend a party hosted by his nemesis, Wil Wheaton. Meanwhile, Howard is offered a chance to be a payload specialist on the International Space Station.
Leonard escorts Amy to a wedding. Meanwhile, Howard convinces Bernadette to spend the weekend with him at his mother's house as a trial run, and Sheldon gets involved in model trains.