Brilliant physicist roommates Leonard and Sheldon meet their new neighbor Penny, who begins by showing them that as much as they know about science, they know little about actual living.

Leonard volunteers to sign for a package in an attempt to make a good impression on Penny, but when he enlists Sheldon for help, his attempt at chivalry goes terribly awry.

Leonard asks a woman out after he finds out that Penny is seeing someone.

Getting fired forces Sheldon to explore what life has to offer outside physics, leaving Leonard to take drastic action to snap his friend out of his funk.

Sensing that he's wasting his time on Penny, Leonard ends up making a connection with Leslie.

Penny hosts a Hallowe'en party, putting Leonard, Sheldon, Wolowitz, and Koothrappali through a new test of their social skills.