Source: wikibot/the-big-bang-theory-season-4
= The Big Bang Theory (season 4)
{wiki=The_Big_Bang_Theory_(season_4)}
"The Big Bang Theory" Season 4 is a season of the popular American sitcom that originally aired from September 23, 2010, to May 19, 2011. The show focuses on a group of friends, primarily physicists Leonard Hofstadter and Sheldon Cooper, and their interactions with each other, their love interests, and the world around them.