The Big Bang Theory: Progressively Harder Sheldon Cooper Knock Knock Quiz

The Big Bang Theory Sheldon
CBS

6. The First Knock Was Traditional. What Were The Other Two For?

For Fun

For People To Jump Out Of The Window

For People To Hide

For People To Get Their Pants On
Contributor

Aimee Klapisch hasn't written a bio just yet, but if they had... it would appear here.