
Surely there are others out there
who still dare to CHALLENGE my reign.
Game of Thrones Season 4, Episode 2

I have no interest in playing a game
in which I find no CHALLENGE.
The Big Bang Theory Season 3, Episode 5

l'm saying,
where's the CHALLENGE?
Breaking Bad Season 4, Episode 2

Maybe you need to CHALLENGE
your motor skills.
The Big Bang Theory Season 10, Episode 22

We accept your CHALLENGE.
Name a time and place.
The Big Bang Theory Season 2, Episode 12