
must I CHALLENGE the law?
Vikings Season 1, Episode 1

Really give ourselves a CHALLENGE.
The Big Bang Theory Season 8, Episode 3

All right, we've defeated the first CHALLENGE.
The Big Bang Theory Season 8, Episode 19

Some boys like a CHALLENGE.
Game of Thrones Season 2, Episode 10

You really want to CHALLENGE yourself,
you could learn to speak Hindi.
The Big Bang Theory Season 10, Episode 22