Season 3, Episode 23: "The Keys"

-Kramer, what are you doing here?! -Jerry, now calm down. It's okay.

-Oh, God. -I'm sorry.

I didn't want to wake you up.

I was watching Thirty Seconds Over Tokyo...

...and I-- You know, I wanted to get some popcorn...

...so I used the spare keys that you gave me...

...to come in to get your popper.

-You scared me! -It's just me.