The Big Bang Theory Episode 3.06 The Cornhusker Vortex

Penny is having a football watching party and initially does not invite Leonard. Leonard thinks its less about his lack of football knowledge and more about Penny being embarrased to introduce him to her friends. Penny reassures Leonard that is not the case and invites him to watch next week's game with her friends. We find out that Sheldon is a football savant and knows everything about the game. Leonard enlists his help and asks Sheldon to come to the party to feed him football facts in order to impress Penny and her friends. It back fires on Leonard when Sheldon takes over as the hit of the party.