The Big bang theory S03E23 The Big Bang Theory Cast: Leonard Hofstadter - Johnny Galecki Sheldon cooper. - Jim parsons Howard Wolowitz - Simon Helberg Rajesh Kootherppali - Kunal Nayyar Penny - Kaley cuoco Amy Farrah Fowler - Mayim Bialik Bernadette Rostenkowski - Melissa Rauch Enjoy the Video & Please like, share and subscribe. The E&R Media. All rights are reserved to Warner Bro. Television & CBS! WBTV