It's been four months since Sheldon met neuro-biologist Amy Farrah Fowler, who Sheldon believes is his intellectual equal as well as his emotional female equivalent. Alth ...

After Leonard and Sheldon have a heated argument about what Sheldon sees as Leonard making a major breach in the roommate agreement, Leonard takes refuge at Penny's apart ...

When Bernadette joins the guys and Penny for their usual Chinese take-out dinner, Bernadette, the microbiologist, becomes fascinated with Leonard's physics project. Both ...

After their third date, Bernadette wants an understanding with Howard about where their relationship is heading before proceeding to the next step of sex. Howard is unsur ...

An argument between Leonard and Penny proves inconvenient to Sheldon. Written by CBS Publicity ...

Based on work that he has done, Sheldon has been chosen to go on a summer long expedition to the magnetic North Pole. Sheldon is in a conundrum. On the one hand, his work ...

In Sheldon's view, the tenants in the apartment directly above his and Leonard's are perfect neighbors since they never make any noise and he doesn't even know them. So h ...

During one of the more quiet moments of a paint-ball tournament where Leslie and Howard are alone in hiding waiting to be killed, they decide to make their final moment m ...

After Howard makes the latest in a long string of inappropriate comments to Penny in what he considers their courting ritual, Penny in return tells Howard in no uncertain ...

Howard calls the guys into the Mars rover control room on an emergency. He maneuvered the rover into a crevice, and he needs some help from Sheldon and Raj to maneuver it ...

After his and Penny's first date, Leonard is in denial about what Penny's non-committal attitude toward a second date means. In reality and what Penny divulges to Sheldon ...

Germaphobe Sheldon is more hyper-vigilant than ever after Penny comes back from Nebraska where she was visiting with family who were sick with an unknown bug. Regardless, ...

Penny receives an unwanted visitor from Nebraska named Christy. In Penny's eyes, Christy is a loose woman with no morals. Hence, Christy is ripe for the picking by Howard ...