The Big Bang Theory Season 2 Episode 3
The Barbarian Sublimation
When Penny locks herself out of the apartment, she comes to hang out with Sheldon in his as he plays Age of Conan. Penny, frustrated by her recent failures in life soon plays and becomes addicted to Conan.
The guys try to get back the old Penny by setting her up on a blind date through a dating service which fails. As Penny becomes more and more addicted, she eventually accepts an online virtual date from Wolowitz and realizes how pathetic she becomes and quits.