The Big Bang Theory “The Vegas Renormalization” Season 2 Episode 21 April 25, 2009 The Big Bang Theory Take a first look at THE BIG BANG THEORY‘s Season 2 Episode 21 “The Vegas Renormalization” airing this Monday April 27 2008. Read all our The Big Bang Theory coverage here. Episode Synopsis: The Big Bang Theory “The Vegas Renormalization” Season 2 Episode 21 – Leonard and Koothrappali take a heartbroken Wolowitz to Las Vegas, leaving Sheldon locked out of his apartment and forced to bunk with Penny, on THE BIG BANG THEORY, Monday, April 27 (8:00–8:30 PM, ET/PT) on the CBS Television Network. Amazon.com Widgets Share this:Click to share on Twitter (Opens in new window)Click to share on Facebook (Opens in new window)Click to share on Reddit (Opens in new window)Click to share on Google+ (Opens in new window)Click to share on Tumblr (Opens in new window)Click to share on Pocket (Opens in new window)