Our babies will be smart And beautiful.

Season 2, Episode 13 - The Friendship Algorithm

Tweety Bird

Season 1 Episode 13 – The Bat Jar Conjecture

Sheldon: You're in my bedroom.

Season 2 Episode 03 – The Barbarian Sublimation

A neutron walks into a bar and asks, How much for a drink?

Season 3 Episode 18 – The Pants Alternative

I'm going to give you the same advice...

Season 5 Episode 16 – The Vacation Solution

Penny: I didn't know what else to do. He had those big, sad eyes

Season 6 Episode 02 – The Decoupling Fluctuation