CBS has announced the details of episode 2.21, which will air April 27th.
"The Vegas Renormalization" — 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.
Jodi Lyn O’Keefe (“Prison Break”) Guest Stars.
You can find more information on the episode in our Episode Guide. A rerun airs next week (April 20th).
, 12:36 15th Apr 2009.| Title | Date Posted | Category |
| Episode 3.10 Announced | 19th November 2009 | Show |
| Episode 2.22 Announced | 27th April 2009 | Show |
| Episode 2.20 Announced | 23rd March 2009 | Show |
| Episode 2.19 Announced | 17th March 2009 | Show |
| Episode 2.15 Announced | 2nd February 2009 | Show |