The Jerusalem Duality
S1, E12: When Sheldon meets Dennis, a 15-year-old physicist who is clearly much brighter than he is, his confidence is so badly shaken that Leonard agrees to help him discredit the precocious teenager's research.

S1, E12: When Sheldon meets Dennis, a 15-year-old physicist who is clearly much brighter than he is, his confidence is so badly shaken that Leonard agrees to help him discredit the precocious teenager's research.