Leonard and Sheldon stand behind the 15-year-old science prodigy Dennis Kim (Austin Lee), who is about to prove to the guys he's smarter than them.
Added:
Leonard and Sheldon meet Dennis Kim, a 15 year old childhood prodigy that makes them question their intelligence, especially Sheldon.
Added:
Being the little nut job that he is, Sheldon runs a few tests after Penny comes back from Nebraska with a cold.
Added:
Sheldon and Leonard both sit together sick on the couch with no one to take care of them.
Added:
Sheldon has one of his co-workers post as his non-existent cousin, Leo, in order to get out of seeing Penny in Rent.
Added:
Sheldon tries to attack Leonard with his mind when he goes to give a presentation that Sheldon does not approve of.
Added:
Penny practices bar tending on the boys in order to learn up for her new job that will help earn her some extra cash.
Added:
Raj gets extremely nervous and anxious after his parents set him up for a blind date with a girl from his childhood.
Added:
As Leonard and Raj go to get Wolowitz from his house for their Halo team they overhear his mother fighting with his new girlfriend.
Added:
Penny joins the boys for a game of Halo and they're a little shocked that she's not bad at the game.
Added:
A picture of Leonard and Penny kissing in costume after Penny's ex-boyfriend is a jerk to Leonard at her Halloween Party.
Added:
Sheldon and Leonard open the door at Penny's Halloween Party dressed like quite the nerds as Penny's large friend enters the apartment.
Added:

TBBT Quotes

Penny: Hey, Sheldon, did you change your Wi-Fi password again?
Sheldon: Yes, it's "Penny, get your own Wi-Fi." No spaces.

Leonard: You can't put that on Snapchat.
Raj: Fine, I'll put it on Facebook like a caveman.