TV series example of the word

The Big Bang Theory Season 3, Episode 5
"Penny, you have any friends you'd like to never hear from again?"

The Big Bang Theory Season 7, Episode 20
I snuck out the window and never saw her again.

Vikings Season 1, Episode 3
I never have.

The Big Bang Theory Season 6, Episode 8
...and you will never know.

Game of Thrones Season 4, Episode 8
What is dead may never die.