<P> The show originally centered on five characters living in Pasadena , California : Leonard Hofstadter and Sheldon Cooper , both physicists at Caltech , who share an apartment ; Penny , a waitress and aspiring actress who lives across the hall ; and Leonard and Sheldon 's similarly geeky and socially awkward friends and co-workers , aerospace engineer Howard Wolowitz and astrophysicist Raj Koothrappali . Over time , supporting characters have been promoted to starring roles including : physicist Leslie Winkle , neuroscientist Amy Farrah Fowler , microbiologist Bernadette Rostenkowski , and Stuart Bloom , the cash - strapped owner of the comic book store the characters often visit . </P>
<P> The show originally centered on five characters living in Pasadena , California : Leonard Hofstadter and Sheldon Cooper , both physicists at Caltech , who share an apartment ; Penny , a waitress and aspiring actress who lives across the hall ; and Leonard and Sheldon 's similarly geeky and socially awkward friends and co-workers , aerospace engineer Howard Wolowitz and astrophysicist Raj Koothrappali . Over time , supporting characters have been promoted to starring roles including : physicist Leslie Winkle , neuroscientist Amy Farrah Fowler , microbiologist Bernadette Rostenkowski , and Stuart Bloom , the cash - strapped owner of the comic book store the characters often visit . </P>
where do the big bang theory characters live
where do the big bang theory characters live
Pasadena , California
Pasadena , California