The Big Bang Theory Season 2 Episode 21 s02e21 titled "The Vegas Renormalization" airdate will be on Monday April 27th of this year. In this Episode of The Big Bang Theory, Leonard and Koothrappali escort a heartbroken Wolowitz to Las Vegas, leaving Sheldon locked out of his apartment and forced to bunk with Penny.

The Big Bang Theory Season 2 Episode 21 s02e21 Full Video:

The Big Bang Theory Season 2 Episode 20: The Hofstadter Isotope will be aired on April 13, 2009. In this Big Bang Theory episode, we'll find that "While a fellow comic book-loving pal of the guys romances Penny, Leonard and Wolowitz venture out into the world of "Ladies' Night" at a local bar."

Rumor has it that this would be the season's finale! Many hearts will be broken if that is so. But hold on fellas, because there will be four (4) more episodes for The Big Bang Theory Season 2. And the show has renewed two more seasons. So the question now is, when does the season end? and when will the third season begin? Wait and watch out for The Big Bang!

The Big Bang Theory Season 2 Episode 20 Video, aka: The Hofstadter Isotope will be posted as soon as it becomes available. So stay tuned for updates.

UPDATE: The Big Bang Theory Season 2 Episode 20 Full Video: The Hofstadter Isotope