Smallville, Season 6

Clark:
People keep secrets for a reason.

Lois:
I don't know. If you ask me, I think a secret is just a big loophole in the whole "thou shall not lie" clause.

Clark:
There's just no gray area with you, is there?

Lois:
Not when someone I thought I knew better than anyone has been keeping the biggest secret of all.

Clark:
What are you talking about?

Lois:
What would you do if one day you realized someone close to you had a serious hero complex?

Clark:
Hero complex?

Lois:
Hiding his true identity from everyone he supposedly cares about? You can't tell me you wouldn't find something wrong with that.

Clark:
Who exactly are we talking about?