Watch this classic "Penny Solves String Theory" clip from the comedy series The Big Bang Theory, created by Chuck and Lorre Bill Prady.<br /><br />The Big Bang Theory Cast:<br /><br />Johnny Galecki, Jim Parsons, Kaley Cuoco, Simon Helberg, Kunal Nayyar, Sara Gilbert, Mayim Bialik, Melissa Rauch, Kevin Sussman and Laura Spencer<br /><br />Stream The Big Bang Theory now on Max!
