Big Bang Theory - Episode 2.3 - "The Barbarian Sublimation"

This is a great episode, hitting pretty much all of the right notes. The episodes which feature strong Penny/Sheldon interaction are among some of the best.

Sheldon introduces Penny to the world of online fantasy gaming, but she quickly becomes addicted. When this addiction interferes with Sheldon's life, he decides to intervene in an effort to bring meaning (or at least romance) back into her real-world life. The efforts fail, but she soon hits rock bottom and realizes that she needs help.

Physics in This Episode

• Condensation - Penny's bag of groceries falls apart, and Sheldon suggests that it is because the condensation on her groceries
• Non-Newtonian Fluid - In one of the more interesting (and replicable) experiments shown on the series, the guys put plastic wrap over speakers and put corn starch and water, a non-Newtonian fluid (sometimes called Oobleck), on it. The speakers cause the fluid to dance around erratically.

Notable Quotes

Leonard: Hey, check it out. It's just corn starch and water.
Sheldon: They make up a non-Newtonian fluid, which is liquid, but solid under the percussive action of the speaker.
Howard: That's what makes it get all funky.

Sheldon: Here's the problem. I was clearly signed up to use the mainframe in Buckman 204 and Dr. Winkle just wantonly ripped the sign-up sheet off the wall.
Leslie:It wasn't even an official sign-up sheet. He printed it off himself and put his name down on every slot for the next 6 months.
Sheldon: If it is a crime to insure that the university's resources are not being squandered chasing subatomic wild geese, then I plead guilty.

More quotes at Internet Movie Database.