
...our genetic MATERIAL
has the potential of producing the first...
The Big Bang Theory Season 4, Episode 1

- Like his haircut MATERIAL.
- Oh, right.
The Big Bang Theory Season 4, Episode 9

Imagine how impressed they'd be if you
showed up familiar with the MATERIAL.
The Big Bang Theory Season 8, Episode 2

it's possible that
I'm not boyfriend MATERIAL.
The Big Bang Theory Season 5, Episode 12

What's the thanks I get for turning
Leonard into quality boyfriend MATERIAL?
The Big Bang Theory Season 4, Episode 19