Killed a White Walker, eh?
Game of Thrones Season 5, Episode 7
But no one's killed
a White Walker in thousands of years.
Game of Thrones Season 3, Episode 10
One of the tennis balls
came off his WALKER
The Big Bang Theory Season 7, Episode 14
Killing the White Walker.
Game of Thrones Season 4, Episode 3
When you killed the White Walker,
Game of Thrones Season 7, Episode 6