The Big Bang Theory

The series is about four friends, Leonard, Sheldon, Raj and Howard.  All four of them work at the same University, Leonard and Sheldon are physicists, Raj is an astrophysicist and Howard a mechanical engineer. They are all geeks, who play video games, watch science fiction movies read comic books.   This group expands throughout the series, as Penny (Leonard and Sheldon's neighbor) becomes very close to them and eventually dates Leonard for some time. Then there is Bernadette who becomes Howard's girlfriend, and Amy whom she goes out with Sheldon.