One of the tennis balls
came off his WALKER
The Big Bang Theory Season 7, Episode 14
how in seven hells
did you manage to kill a White Walker?
Game of Thrones Season 4, Episode 9
I killed a White Walker, I killed a Thenn.
Game of Thrones Season 5, Episode 7
Killing the White Walker.
Game of Thrones Season 4, Episode 3
A White Walker stabbed me in the gut
with a sword of ice.
Game of Thrones Season 6, Episode 6