All right, we've defeated the first CHALLENGE.
The Big Bang Theory Season 8, Episode 19
must I CHALLENGE the law?
Vikings Season 1, Episode 1
Surely there are others out there
who still dare to CHALLENGE my reign.
Game of Thrones Season 4, Episode 2
it was an unnecessary CHALLENGE
to our heterosexuality.
The Big Bang Theory Season 5, Episode 17
Challenge accepted! Sounds like it's time
for the Sheldon Cooper Apology Tour!
The Big Bang Theory Season 9, Episode 13