
but when they're TWIN primes,
The Big Bang Theory Season 9, Episode 12

Now, I've lived my whole life dealing
with the fact that my TWIN brother is...
The Big Bang Theory Season 1, Episode 15

I already shared a uterus
with my TWIN sister.
The Big Bang Theory Season 12, Episode 19

Penny, this is Sheldon's TWIN sister.
Missy, this is our neighbor Penny.
The Big Bang Theory Season 1, Episode 15

The Crown and the Faith
are the TWIN pillars of the world.
Game of Thrones Season 6, Episode 3