The Big Bang Theory S02E13 - The Friendship Algorithm

One of my favourite comedy series
Socially awkward, Sheldon develops a scientific procedure (the titular "Friendship Algorithm") for making friends. He needs to use an open science grid computer that is in Barry Kripke's office, but Leonard tells Sheldon that only Barry's friends can use it. After repeated rebuffs from Kripke, Sheldon finds a children's book in the bookstore (where he is hurried out by Leonard who finds him innocently chatting to a little girl in view of a security camera) about how to make friends.