Leonard: I'm not a crybaby.
Penny: Toy Story 3?
Leonard: They were holding hands in a furnace!

Bernadette: This is pretty cool. You don't see too many spherical cakes.
Amy: I wonder why that is.

Sheldon: When Darth Vader struck down Obi-Wan, did Luke cry like a baby and go to his funeral?
Penny: No. He blew up the Death Star. Why do I know this?!

You're being so quiet. Are you upset or are you just rebooting?

Howard

Sheldon: Amy, mourning the inevitable is a complete waste of time.
Amy: And watching a bunch of goody space movies you've seen hundreds of times isn't?
Sheldon: If we were in a physical relationship, you just lost sex tonight.

Professor Proton is dead?

Sheldon

May the forth be with you. Get it?

Raj