In this clip from next week's Smallville, "Stiletto," We see Lois in her superhero costume where she calls herself Stiletto. In this scene, Clark calls her out on being Lois.
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Smallville Quotes

I'm about as real as it gets.

Chloe

Oliver: You've done a hell of a job keeping the world safe on your own, Clark. I'm here to help you now.
Clark: Good. Something tells me...soon the world will need all the help we can get.