Those are PRODUCTION markings.
The Big Bang Theory Season 3, Episode 17
Well, Penny is on her way to perform in
a one-night showcase PRODUCTION of Rent...
The Big Bang Theory Season 1, Episode 10
...to inadequate serotonin PRODUCTION.
The Big Bang Theory Season 1, Episode 10
Yeah, they say the yeast in beer
helps with milk PRODUCTION.
The Big Bang Theory Season 10, Episode 22
That's the one thing I'm certain of,
PRODUCTION cannot stop.
Breaking Bad Season 3, Episode 13