Sheldon opts to spend a weekend playing video games with the guys instead of attending a birthday party for Amy’s aunt.

After his barber is hospitalized, Sheldon undergoes a hair-raising change in lifestyle as his carefully planned daily routines are thrown for a loop. Meanwhile, Howard is up in the air about continuing his astronaut training.

Sheldon and Kripke square off in a series of sports-related competitions to win a coveted corner office at the university. Meanwhile, Penny feels uncomfortable accepting a gift from Amy.

Sheldon takes it easy by working with Amy at her neurobiology lab after the university orders him to take a vacation. Meanwhile, Howard gets worked up when Bernadette suggests they sign a prenuptial agreement.

The friendship contract is in danger of being nullified when Leonard tires of Sheldon’s selfish ways, and Wolowitz is spacing out over selecting an astronaut nickname for himself

Leonard and Penny give dating another try, while Raj begins a rather unorthodox relationship with the virtual assistant on his phone.

Everything might change when Leonard offers Penny a spur of the moment invitation to a romantic dinner for two

Amy is upset with Sheldon when he isn’t impressed with her recent accomplishment; Howard struggles with Bernadette’s aversion to children.

Leonard confronts his fears when he’s contacted by a bully who tormented him in high school

Amy is crushed when Bernadette and Penny go shopping for wedding dresses without her