TV may be losing The Graysons, but how about this for a replacement?

On November 27, Smallville will air an episode that is one of the most eagerly anticipated geekfest events of the season, as Clark Kent is visited by three heroes from the 30th Century, aka the Legion of Super-Heroes.

The episode, Legion, features fan favorites Saturn Girl, Lightning Lad, and Cosmic Boy, who have been staples of the DC Comics universe since 1958.

So far, only 22 year-old Alexz Johnson has been cast as the female member of the team. She previously toplined in the Canadian talent-hunt series Instant Star.

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