
I've been doing research on ADDICTION...
The Big Bang Theory Season 1, Episode 10

Did I tell you our lab got a grant
to study ADDICTION?
The Big Bang Theory Season 4, Episode 20

He's one of the animals in my
department's nicotine ADDICTION study.
The Big Bang Theory Season 4, Episode 21

Don't forget genetic predisposition
towards ADDICTION.
The Big Bang Theory Season 1, Episode 10

...gambling ADDICTION
and sexually-transmitted diseases.
The Big Bang Theory Season 2, Episode 21