
- But the mission is for six months.
- That's the CODE red.
The Big Bang Theory Season 2, Episode 22

The Hammurabic CODE is an eye for an eye,
not a bed for a bed.
The Big Bang Theory Season 4, Episode 24

That's my CODE word
for "language."
The Big Bang Theory Season 11, Episode 12

using Morse CODE?
The Big Bang Theory Season 7, Episode 1

Oh, you mean, like,
with a CODE word?
Sure.
The Big Bang Theory Season 12, Episode 18