The — Loobenfeld Decaythe Big Bang Theory : Seaso...

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

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.

Despite Sheldon’s elaborate attempts to protect Leonard's social standing, the episode ends with Leonard forced to watch a video recording of Penny’s performance anyway, while "Cousin Leo" ends up cozying up to Penny on the sofa.

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

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.

Despite Sheldon’s elaborate attempts to protect Leonard's social standing, the episode ends with Leonard forced to watch a video recording of Penny’s performance anyway, while "Cousin Leo" ends up cozying up to Penny on the sofa.