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

To make the lie concrete, Sheldon hires Toby (played by guest star DJ Qualls), a research assistant with a double major in physics and theater.

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. The Loobenfeld DecayThe Big Bang Theory : Seaso...

After hearing Penny’s "cringe-inducing" singing, Leonard lies about attending a symposium on molecular positronium to avoid watching her perform in Rent . Sheldon, unable to live with the "holes" in Leonard's story, decides to backstop the lie with an "un-unravelable web". Highlights & Trivia To make the lie concrete, Sheldon hires Toby

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. Sheldon, unable to live with the "holes" in