Raj gets an ego boost after winning some fame from a magazine article and risks his friendship with Leonard by trying to win over Penny. ~ Bill Ecklund, All Movie Guide

Sheldon shows Penny the joys of online gaming, creating an addict in the process. ~ Bill Ecklund, All Movie Guide

A jealous Leonard reacts to Penny's new guy by rebounding with Leslie. ~ Bill Ecklund, All Movie Guide

In the second-season opener, Penny surprisingly turns to Sheldon as a confidant after her disastrous first date with Leonard. ~ Bill Ecklund, All Movie Guide

Leonard asks Penny out on a date after she breaks up with her boyfriend. To prepare for the big night, Leonard practices the date the day before with the guys. ~ Bill Ecklund, All Movie... Full summary

Penny's plans for a surprise birthday party for Leonard, who doesn't usually mark the occasion, get thrown off-kilter when Sheldon gets a chance to live out one of his biggest dreams. ~... Full summary

Leonard devises a plan to eliminate his rivals when he, Wolowitz and Koothrappali all fall for Sheldon's twin sister, but his plan backfires when Sheldon decides to choose who his... Full summary

Leonard and the guys buy a time machine prop from a classic movie; Penny tells the guys their obsession with comics and toys is pathetic.

The men compete in the university's lighthearted physics bowl, but Sheldon's much-too-serious attitude forces them to replace him with his nemesis, Leslie Winkle , ~ Bill Ecklund, All... Full summary

Sheldon becomes jealous of a 15-year-old physics prodigy, so he and Leonard come up with a plan to sabotage the young man's research. ~ Bill Ecklund, All Movie Guide