The Big Bang Theory Episode 3.14 The Einstein Approximation

Sheldon is suffering from "Theorist's block" and cannot complete a formula he has been working on for sometime. Taking inspiration from Einstein, who discovered the theory of special relativity while working in a patent office, Sheldon takes a menial job busing tables at the local Cheesecake factory in an attempt to jump start his brilliance. He was never actually hired at the Cheesecake Factory but decides to just to start working in an effort to clear his block. Penny tries to stop him but Sheldon is doing surprisingly well and even serves the guys' a meal. Sheldon finally achieves the great breakthrough he is looking for- it comes in the form of a broken dish.