Look, Sheldon, sweetie,
I know you're feeling INSECURE...
The Big Bang Theory Season 3, Episode 13
I can't believe
Leonard would be so INSECURE.
The Big Bang Theory Season 10, Episode 22
...that makes you a little INSECURE.
The Big Bang Theory Season 8, Episode 6
but whenever you're between projects
you tend to get a little INSECURE.
The Big Bang Theory Season 10, Episode 23
You know, I've always been INSECURE
The Big Bang Theory Season 9, Episode 12