Sheldon Cooper

Sheldon Lee Cooper, Ph.D., Sc.D., is a fictional character in the CBS television series The Big Bang Theory, portrayed by actor Jim Parsons.
Sheldon is a theoretical physicist at Caltech who shares an apartment with his colleague and best friend, Leonard Hofstadter (Johnny Galecki). He is a former child prodigy with genius level IQ, but displays an almost total lack of social skills, a tenuous understanding of humor, and difficulty recognizing irony and sarcasm in other people, although he himself often employs them. He exhibits highly idiosyncratic and narcissistic behavior and a general lack of humility or empathy.