I know what a CHALLENGING man he could be,
The Big Bang Theory Season 9, Episode 14
but the truth is,
Amy is just as CHALLENGING.
The Big Bang Theory Season 10, Episode 5
It's like me CHALLENGING you
to a sexy pants contest.
The Big Bang Theory Season 8, Episode 19
Not CHALLENGING?
I was humiliating the man.
The Big Bang Theory Season 6, Episode 6
- Just as CHALLENGING.
- Yes.
The Big Bang Theory Season 10, Episode 5