Alias, Season 2

Sydney:
Research? What kind of research?

Vaughn:
It's something private. Something just for me.

Sydney:
Who do you think you work for? Nothing is private. You're being investigated.

...

Vaughn:
I had to find out if she was deceiving us again. I mean, I could not sleep at night knowing I was doing nothing. That somehow, I was helping her.

Sydney:
And did you find anything?

Vaughn:
Nothing. She's clean.