The Friendship Algorithm

Summary
Sheldon needs access to the open science grid computer and Kripke controls access to it. So Sheldon attempts to befriend him. He also asks his existing friends to fill out exhaustive surveys about why they like him. As he is having trouble he heads out to buy a book which will teach him how to make friends. He joins Kripke rock climbing and faints but is able to bring Kripke home for dinner. There he evicts Raj from his friendship circle to make room for Kripke before returning things to the status quo when he discovers Kripke doesn’t control access to the computer after all.

Critics
"Those writers love Sheldon. He is the reason this show is on the map in many ways. At present he is also the reason it will never become more than it." - The TV Critic's Review