S02e20 - Watch Www Xrysoi Se The Big Bang Theory -

"The Hofstadter Isotope" (Season 2, Episode 20), originally aired on April 13, 2009, features the introduction of comic book store owner Stuart Bloom, who asks Penny out on a date. While the guys head to a bar for "ladies' night," the episode highlights the contrast between the main characters and typical social scenarios. Stream the episode on Max . The Hofstadter Isotope