"The CHALLENGING
climate of Scandinavia
The Big Bang Theory Season 12, Episode 23
- Just as CHALLENGING as you?
- Yeah...
The Big Bang Theory Season 10, Episode 5
It really doesn't matter
as long as it's CHALLENGING.
The Big Bang Theory Season 10, Episode 22
- Just as CHALLENGING.
- Yes.
The Big Bang Theory Season 10, Episode 5
I know what a CHALLENGING man he could be,
The Big Bang Theory Season 9, Episode 14