"The CHALLENGING
climate of Scandinavia
The Big Bang Theory Season 12, Episode 23
- Just as CHALLENGING.
- Yes.
The Big Bang Theory Season 10, Episode 5
Oh, we'll make the puzzles
extremely CHALLENGING
The Big Bang Theory Season 9, Episode 8
...indicating he's CHALLENGING
the ruling on the field.
The Big Bang Theory Season 3, Episode 6
It's like me CHALLENGING you
to a sexy pants contest.
The Big Bang Theory Season 8, Episode 19