When Sheldon starts suffering from "theorist's block" and can't complete a formula, he becomes depressed and is willing to do anything to find the right answer. He tries several techniques to find the answer, but none of them works, but when he figures out how to figure the answer out, he starts working at the Cheesecake Factory with Penny (much to her dismay). However, it turns out Sheldon is like the perfect employee, even passing Penny in the number of customers.