After Leonard (Johnny Galecki) leaves a tie on his door, Sheldon (Jim Parsons) asks Penny (Kaley Cuoco) what the etiquette is for when a roommate has a “special guest” over. Watch The Big Bang Theory on TBS. #TBS #TheBigBangTheory #JohnnyGalecki #JimParsons #KaleyCuoco SUBSCRIBE: bit.ly/TBSSub Download the TBS App: bit.ly/1qBbkMW About The Big Bang Theory: Leonard and Sheldon are brilliant physicists, the kind of ''beautiful minds'' that understand how the universe works. But none of that genius helps them interact with people, especially women. All this begins to change when a free-spirited beauty named Penny moves in next door. Starring Johnny Galecki, Jim Parsons, Kaley Cuoco, Simon Helberg, Kunal Nayyar, Mayim Bialik, and Melissa Rauch. Created by Chuck Lorre and Bill Prady. Full episodes: tbs.com/shows/the-big-bang-theory Get Social With The Big Bang Theory: Facebook: facebook.com/TheBigBangTheory Twitter: twitter.com/bigbang...