The Big Bang Theory Season 1 (17 Episodes)
In the series premiere, when Leonard and Sheldon meet Penny, Leonard is immediately interested in her. But Sheldon feels his friend is chasing a dream he’ll never catch.
After Leonard tries to do a favor for Penny, Sheldon ruins the plan. Leonard volunteers to sign for a package, hoping to make a good impression on Penny.
Leonard is depressed to learn that Penny is dating someone. As a result, encouraged by his friends and fellow scientists, Leonard actually summons the nerve to ask a woman out on a date. SARA GILBERT (“Roseanne”) guest stars as Leslie.
After being fired from his job, Sheldon attempts to explore the “dreadful” life beyond physics. But his initial thrill of shopping with Penny devolves over time to him weaving ponchos as a shut-in, forcing Leonard to call on Sheldon’s mother, Mary (LAURIE METCALF – “Roseanne”).
After sensing that his pursuit of Penny isn’t going anywhere, Leonard agrees to an unexpected sexual encounter with fellow scientist Leslie Winkle (recurring guest star SARA GILBERT). The one-night stand throws Leonard and Sheldon deep into uncharted social waters.
The socially stunted guys are nervous when Penny invites them to a party she’s hosting.
When Wolowitz seduces Penny’s friend and ends up sleeping with her in Penny’s apartment, Penny sleeps on Leonard and Sheldon’s couch.
Koothrappali becomes overwhelmed when his parents arrange a blind date for him, but he discovers he actually can talk to a member of the opposite sex after a few drinks.
Sheldon and Leonard are invited to present their joint findings at a physics conference, but Sheldon refuses.
After hearing Penny sing, Leonard lies to avoid seeing her perform. Sheldon goes one step further with a more elaborate lie, leading to the appearance of his nonexistent cousin. D.J. QUALLS (“Road Trip”) guest stars.
Sheldon gets sick and Penny has to deal with him.
When Leonard and Sheldon meet a teenage physics prodigy, Sheldon is distraught that the boy genius is younger and smarter, and crafts a plan to derail the young prodigy’s research.
The guys kick Sheldon off the team for the Physics Bowl and enlist his nemesis Leslie Winkle (recurring guest star SARA GILBERT) to take his place.
When the guys buy a time-machine prop from a classic movie, Penny’s reaction forces Leonard to take a hard look at his life.
Leonard, Wolowitz, and Koothrappali all become smitten with Sheldon’s twin sister, Missy (guest star COURTNEY HENGGELER), and Leonard devises a plan to eliminate his rivals.
When Penny attempts to throw Leonard a wild surprise party, Sheldon gets in the way.
When Penny breaks up with her boyfriend, Leonard finally gets up the courage to ask her out on a real date. When she says yes, each seeks the “wisdom” of a reluctant advisor — Sheldon.