
I'm willing to take our relationship
to the next LEVEL.
The Big Bang Theory Season 10, Episode 5

Yeah, I've had him since Level 10.
The Big Bang Theory Season 1, Episode 1

Oh, and every other day,
check the water LEVEL on the avocado pit.
The Big Bang Theory Season 10, Episode 4

to hiscomfort LEVEL,
The Big Bang Theory Season 12, Episode 23

SHELDON: Ugh, I don't want the next LEVEL.
I like this LEVEL.
The Big Bang Theory Season 4, Episode 5