
Leonard grew up to be
an EXPERIMENTAL physicist.
The Big Bang Theory Season 1, Episode 16

Oh, yes, EXPERIMENTAL physics,
The Big Bang Theory Season 12, Episode 22

One of their EXPERIMENTAL physicists
dropped out and I recommended you.
The Big Bang Theory Season 6, Episode 24

So if you are considering
going into EXPERIMENTAL physics...
The Big Bang Theory Season 2, Episode 6

And they're all hopped up
on EXPERIMENTAL steroids.
The Big Bang Theory Season 2, Episode 16