
It's "Halo" night.
The Big Bang Theory Season 1, Episode 7

...but on a more serious note,
it's 8:13 and we're still not playing "Halo."
The Big Bang Theory Season 1, Episode 7

You can't go out, it's "Halo" night.
The Big Bang Theory Season 1, Episode 7

Wednesday's Halo night.
The Big Bang Theory Season 2, Episode 6

Do I have a HALO?
Breaking Bad Season 5, Episode 8