TV series example of the word

The Big Bang Theory Season 9, Episode 16
Well, he used a period instead of a question mark,

Breaking Bad Season 5, Episode 13
You mark "10" under this column

The Big Bang Theory Season 12, Episode 24
actors mark stages this way with just chewed gum.Yeah.

Breaking Bad Season 2, Episode 3
I see the mark of the beast there, huh?

The Big Bang Theory Season 10, Episode 17
about the beauty mark on her shoulder.