
...and you're looking BACK in mine...
The Big Bang Theory Season 6, Episode 1

Do not throw her BACK.
The Big Bang Theory Season 5, Episode 12

All right, guys, you have to go BACK.
I can't afford you.
The Big Bang Theory Season 4, Episode 22

Think BACK, Leonard.
The littlest things can set women off.
The Big Bang Theory Season 2, Episode 1

and when I come BACK,
I have to pick up a poodle crap.
The Big Bang Theory Season 5, Episode 24