Look, Sheldon, sweetie,
I know you're feeling INSECURE...
The Big Bang Theory Season 3, Episode 13
but whenever you're between projects
you tend to get a little INSECURE.
The Big Bang Theory Season 10, Episode 23
So INSECURE.
The Big Bang Theory Season 5, Episode 13
You know, I've always been INSECURE
The Big Bang Theory Season 9, Episode 12
...that makes you a little INSECURE.
The Big Bang Theory Season 8, Episode 6