<P> The show is primarily 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 later becomes a pharmaceutical representative and 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 . The geekiness and intellect of the four men are contrasted for comic effect with Penny 's social skills and common sense . </P>
<P> The show is primarily 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 later becomes a pharmaceutical representative and 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 . The geekiness and intellect of the four men are contrasted for comic effect with Penny 's social skills and common sense . </P>
what city does big bang theory take place
what city does big bang theory take place
Pasadena , California
Pasadena , California