That's it. The Sheldon Cooper
Girlfriend Challenge is officially live.
The Big Bang Theory Season 9, Episode 8
We accept your CHALLENGE.
Name a time and place.
The Big Bang Theory Season 2, Episode 12
With their support, none
could CHALLENGE us.
Game of Thrones Season 6, Episode 2
All right, we've defeated the first CHALLENGE.
The Big Bang Theory Season 8, Episode 19
The CHALLENGE is declined.
Vikings Season 1, Episode 6