
Obviously, Leonard is CONCERNED that his
mother won't approve of you as his mate.
The Big Bang Theory Season 3, Episode 11

If I were you, I'd be more CONCERNED
about what they're passing off as chicken.
The Big Bang Theory Season 1, Episode 17

LEONARD: I'm just a little CONCERNED
about you and...
The Big Bang Theory Season 2, Episode 3

Secret-keeping is a complicated endeavor.
One has to be CONCERNED...
The Big Bang Theory Season 2, Episode 1