
I'm sorry, was I being too SUBTLE?
The Big Bang Theory Season 4, Episode 3

- Subtle.
- Yeah, but you got it, right?
The Big Bang Theory Season 8, Episode 18

Subtle, Mom. Real SUBTLE.
The Big Bang Theory Season 8, Episode 23

Really? Did you miss the SUBTLE indicators?
Like me saying, "Howard, I am upset."
The Big Bang Theory Season 3, Episode 7

It was a SUBTLE nod to a book
called Stand on Zanzibar,
Westworld Season 3, Episode 8