After Sheldon and Howard assert that Dr. Underhill made all the work Leonard has done useless, Leonard hypocritically says "the guy was just in the right place, at the right time with the right paradigm-shifting reinterpretation of the universe. He got lucky." Once David approaches Leonard in the cafeteria about their work examining the radiation levels of photomultiplier tubes for a new dark matter detector, Leonard gives him several phone numbers to reach him and states he is a big fan.