This episode marks the very first time we see Sheldon's iconic "knock, knock, knock, [Name]" habit—though in this early version, it’s actually four knocks.

Check out more episode details on the Big Bang Theory Wiki or see fan reviews on IMDb .

Sheldon invents a drug-addicted cousin, Leopold Houston, complete with a Facebook page and an e-harmony profile.

Sheldon "over-correction" from the early seasons? The Loobenfeld Decay - The Big Bang Theory Wiki | Fandom

"The Loobenfeld Decay": When White Lies Go Nuclear ⚛️ In the 10th episode of The Big Bang Theory 's debut season, a simple "I can’t make it" from Leonard spirals into a masterclass of Sheldon Cooper-level over-engineering.