The Big Bang Theory

2007•4 series•Entertainment / Comedy

Available on TLC HD

Mensa-fied best friends and roommates Leonard and Sheldon, physicists who work at the California Institute of Technology, may be able to tell everybody more than they want to know about quantum physics, but getting through most basic social situations, especially ones involving women, totally baffles them. How lucky, then, that babe-alicious waitress/aspiring actress Penny moves in next door. Frequently seen hanging out with Leonard and Sheldon are friends and fellow Caltech scientists Wolowitz and Koothrappali. Will worlds collide? Does Einstein theorize in the woods?

Episode 19The Solder Excursion Diversion

Sheldon shocks Amy with a startling revelation after she buys him a laptop. Raj throws Leonard and Howard under the bus when they lie to their wives. S9, Ep19

Episode 20The Big Bear Precipitation

Sheldon shares a secret about Leonard when the two go on a weekend trip with Penny and Amy; Raj goes all out with pregnancy gifts. S9, Ep20

Episode 21The Viewing Party Combustion

During a group get-together, a minor argument between Sheldon and Leonard turns into a heated debate, leaving the rest of the gang to choose sides. S9, Ep21

Episode 22The Fermentation Bifurcation

Sheldon stays with Bernadette while the rest of the gang attends an event where they run into Penny's former boyfriend and meet Raj's girlfriend. S9, Ep22