Come and See the Most Notable Moments of Big Bang Theory History!

Leonard, Penny, Sheldon, Howards, and Raj win the Costume Contest at their local Comic Book Store.

Before going to a Costume Party, the crew has a small problem on their choice of costumes.

Penny finally realizes she might be addicted to her online game.

Leonard chases Sheldon in the ball pit. Sheldon keeps hiding and popping up saying his most notable word "Bazinga".