Lola on Instagram: "🎬 Fun Fact: The Big Bang Theory (2007–2019), Season 2 Episode 3 During the filming of this episode, Jim Parsons (Sheldon) admitted in an interview that he had to repeat one particular line over a dozen times because he couldn’t keep a straight face while acting with Kaley Cuoco (Penny). The crew left several bloopers of this moment, showing how difficult it was for him to deliver Sheldon’s overly serious dialogue without laughing."