Rally other The Big Bang Theory fans with the most interactive fan chains online. Pass on The Big Bang Theory chains to other fans, or start a chain of your own about your favorite The Big Bang Theory episodes or characters such as Leonard Hofstadter (Johnny Galecki), Sheldon Cooper (Jim Parsons), Howard Wolowitz (Simon Helberg), Rajesh Koothrappali (Kunal Nayyar), and Penny (Kaley Cuoco).