The foursome spend their time working on their individual work projects, playing video games, watching science-fiction movies, or reading comic books. They are also friends with their Cal Tech colleagues mechanical engineer Howard Wolowitz and astrophysicist Rajesh Koothrappali. They are colleagues, best friends, and roommates, although in all capacities their relationship is always tested primarily by Sheldon’s regimented, deeply eccentric, and non-conventional ways. Plot: Leonard Hofstadter and Sheldon Cooper are both brilliant physicists working at Cal Tech in Pasadena, California. Stars: Johnny Galecki, Jim Parsons and Kaley Cuoco
