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

Before the chaos starts, Leonard and Sheldon have a classic argument about why an artificial intelligence like Skynet would bother making "petite, hot, 17-year-old killer robots".

Sheldon invents a drug-addicted cousin, Leopold Houston, complete with a Facebook page and an e-harmony profile. The Loobenfeld DecayThe Big Bang Theory : Seaso...

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. Before the chaos starts, Leonard and Sheldon have

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. Before the chaos starts