The Shiny Trinket Maneuver 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.
The Recombination Hypothesis Everything might change when Leonard offers Penny a spur of the moment invitation to a romantic dinner for two.
The Beta Test Initiation Leonard and Penny experiment with dating, while Raj develops a peculiar relationship with his phone's virtual assistant.
The Friendship Contraction Sheldon's selfish demands force Leonard to reconsider their friendship. Meanwhile, Wolowitz tries to pick his astronaut nickname.
The Vacation Solution When Sheldon is forced to take his vacation, he goes to work with Amy in her neurobiology lab. Meanwhile, Bernadette wants Howard to sign a pre-nup.
The Rothman Disintegration When an office at the University opens up, Sheldon must compete for it with his archenemy, Kripke. Meanwhile, a gift from Amy makes Penny uncomfortable.
The Werewolf Transformation Sheldon's life is turned upside-down after his barber gets sick. Meanwhile, astronaut training causes Wolowitz to rethink his decision to go into space.
The Weekend Vortex Sheldon chooses to play video games with the guys rather than go with Amy to her aunt's birthday party.
The Transporter Malfunction 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.
The Hawking Excitation When Wolowitz gets to work with Stephen Hawking, Sheldon is willing to do anything to meet his hero.
The Stag Convergence Bernadette reconsiders marrying Howard after learning about his sexual history.
The Launch Acceleration NASA reschedules Howard's mission, putting the wedding plans in jeopardy. Meanwhile, Leonard says something surprising to Penny in the bedroom.
The Countdown Reflection When Howard and Bernadette decide they want to be married before his NASA launch, the gang rushes to put on a wedding.