Kunal Nayyar stars as Raj, one of the geeks in the hit CBS sitcom The Big Bang Theory, which airs tonight 9:30 p.m. ET/PT. The actor explains why the show, which co-stars Johnny Galecki and Kaley Cuoco, brings out the inner nerd to many a TV addict. (CLICK ON THE MEDIA BAR TO HEAR Kunal Nayyar)