Probably one of the biggest moments in the history of the show was Penny telling Leonard she loved him, and it took only one take to achieve it. New show runner Steve Molaro revealed, Kaley said to Johnny, 'I don't know about you, but when we started the scene, the cameras and the live audience all went away and it was just us,' later adding that he told both actors the shot was beautiful and he knew theyd never get anything better. How sweet!