Physicists Dr. Leonard Hofstadter and Dr. Sheldon Cooper get their lives shaken up when an attractive young aspiring actress from Omaha, Nebraska named Penny moves in to the apartment across the hall from theirs. Leonard begins to become hopelessly enamored of Penny, while she feels only platonic affection for him; as a result, she finds herself putting up with his closest and ever-present friends: his roommate, Sheldon, who appears borderline obsessive-compulsive; engineering whiz Howard Wolowitz, a desperately sex-crazed mama's boy who thinks that his 1970s-style clothing and hairstyle give him an air of cool hipness; and Dr. Rajesh "Raj" Koothrappali, who will not speak to her, as he is too shy to talk to girls, unless intoxicated, where he becomes a smooth talking yet highly overly aggressive womanizing flirt.
During Season One, Sheldon loses his job for insulting his new boss, finds his ego bruised by a child prodigy, and finds himself unable to bear being part of a lie that Leonard has told, always attacking the world with a relentless need to assert his supremacy. Rajesh first learns that he can talk to girls, but only when he's drunk, and Penny and Leonard finally go out in the season finale.
The second season of the American sitcom The Big Bang Theory was originally aired on CBS from September 22, 2008 to May 11, 2009 over 23 episodes.
Season two begins to deal with character development, including Sheldon becoming more and more obsessive. Leonard and Penny's relationship takes a turn for the worse when they break up, but quickly is resolved. Soon their relationship progresses into a stronger friendship than before, while Sheldon and Penny's friendship slowly begins. In the season finale Penny hints at her true feelings for Leonard. Howard's character remains similar to that of season one in his attempts to seduce women, managing to start a short-lived sexual relationship with Leslie Winkle in the second half of the season, while Rajesh manages to briefly apologize to Penny without having consumed alcohol.
The third season of the American sitcom The Big Bang Theory was originally aired on CBS from September 21, 2009 to May 24, 2010 with 23 episodes. It has received higher ratings than the previous two seasons with over 15 million viewers.[citation needed] The Complete Third Season DVD erroneously credits Mark Cendrowski for directing the entire season.
This is a list of episodes for the fourth season of the American sitcom The Big Bang Theory, which began airing on CBS on September 23, 2010.[2] During the season, actress Kaley Cuoco was absent from some episodes after she broke her leg in a horse-riding accident. When she returned to the series she was shown working as a bartender instead of waitressing at her usual workplace, The Cheesecake Factory, to hide her injury.
Kaley Cuoco's broken leg
During this season, Kaley Cuoco broke her leg in a horse-riding accident and missed two episodes, "The Desperation Emanation" and "The Irish Pub Formulation". When she returned, she was shown working as a bartender, instead of in her normal employment as a waitress at The Cheesecake Factory. Her cast was concealed, and no mention of the unseen broken leg was made. A body double was used in scenes where Cuoco's character, Penny, walks, such as near the end of the season's eighth episode, "The 21-Second Excitation"
