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

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.

Leonard has to face his old high school bully, while Penny thinks she may have been a bully herself.

Leonard and Sheldon are brilliant physicists, the kind of “beautiful minds” that understand how the universe works. But none of that genius helps them interact with people, especially women. All this begins to change when a free-spirited beauty named Penny moves in next door. Sheldon, Leonard’s roommate, is quite content spending his nights playing Klingon [...]

When it is revealed that Penny and Bernadette went wedding dress shopping without her, Amy becomes heartbroken.

When it is revealed that Penny and Bernadette went wedding dress shopping without her, Amy becomes heartbroken.

At Halloween, Sheldon tries to scare his friends. Meanwhile, Leonard tries to change his image.

Leonard and Sheldon are brilliant physicists, the kind of “beautiful minds” that understand how the universe works. But none of that genius helps them interact with people, especially women. All this begins to change when a free-spirited beauty named Penny moves in next door. Sheldon, Leonard’s roommate, is quite content spending his nights playing Klingon [...]

Sheldon and Leonard are invited to a party hosted by Wil Wheaton, and Howard is offered a once-in-a-lifetime event.

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