I can't believe
Leonard would be so INSECURE.
The Big Bang Theory Season 10, Episode 22
You know, I've always been INSECURE
The Big Bang Theory Season 9, Episode 12
I can't believe you'd say that. You know
how INSECURE I am about my insecurities.
The Big Bang Theory Season 8, Episode 6
Look, Sheldon, sweetie,
I know you're feeling INSECURE...
The Big Bang Theory Season 3, Episode 13
So INSECURE.
The Big Bang Theory Season 5, Episode 13