In the end, Penny is horrified to realize she has accepted a virtual date with Howard, and promptly stops playing, thus overcoming her addiction.
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Penny later tells Sheldon that she lied to Leonard about graduating from community college, feeling he would not want to date a woman who is not smart, and makes Sheldon promise not to tell him.
Sheldon cannot easily keep secrets, and moves out of the apartment to escape his inner conflict.
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.
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.
The Complete Season DVD was released September 15, 2009, and a Blu-ray version was reissued on July 10, 2012, with remastered surround sound audio, whereas the DVD version only had stereo.
Season two starts immediately after the end of season one with Leonard and Penny's date.