The guy's a genius. Maybe you weren't
CHALLENGING enough for him.
The Big Bang Theory Season 6, Episode 6
Being your girlfriend is so CHALLENGING.
The Big Bang Theory Season 8, Episode 24
It's like me CHALLENGING you
to a sexy pants contest.
The Big Bang Theory Season 8, Episode 19
but the truth is,
Amy is just as CHALLENGING.
The Big Bang Theory Season 10, Episode 5
- Just as CHALLENGING.
- Yes.
The Big Bang Theory Season 10, Episode 5