ZOE SALDANA
Nyota Uhura in Star Trek

The sharp object of Kirk's unreciprocated envy just gets hotter once it's open she's looking up with none other than that geek spirit Spock. Yes, America, it's nerds FTW!
YUNJIN KIM
Sun Hwa Kwon on Lost

TRICIA HELFER
Number Six on Battlestar Galactica

Cameron on Terminator: The Sarah Conner Chronicles

You be able to get into us any times you want, Summer Glau. En. Knee. Time.
SALLI RICHARDSON-WHITFIELD
Allison Blake on Eureka

A number of sci-fi geeks will keep in brains Richardson-Whitfield from caller stints on Star Trek: Deep Space Nine, Stargate SG-1, and Gargoyles, but she's really come into her own as the sultry, stern, all-business Allison, director of overall Dynamics — the mega-company that employs many of the geniuses that live in the town of Eureka. (She was also woman sufficient to land Will Smith as a husband — in 2007's I Am Legend, anyway.)
MOON BLOODGOOD
Blair Williams in Terminator Salvation

Kara ''Starbuck'' Thrace on Battlestar Galactica

It's not effortless mounting from the ashes of an reporting spacecraft and getting labeled a ''portent of death.'' But Sackhoff's Starbuck not only did all that, but she led the human-Cylon dual forces in a kick-ass gun battle and looked sexy as hell doing it.
GILLIAN ANDERSON
Dana Scully in The X-Files: I Want to Believe

All right, so the X-Files result came out last summer and belly flopped at the box-office. But Anderson's Scully, with her strong suspicion and stoic faith in science, proved a dream of ghostly beauty in Chris Carter's otherwise bleak and solid cinemascope. Or, yeah, she was perfectly hot.
EVANGELINE LILLY
Kate Austen on Lost

This been a few seasons since we saw Kate sauntering approximately the beach in her skivvies. But her sexy, tomboy swagger doesn't craft it hard to buy that her revisit to the Island threw a wrench in Sawyer's playing house with Juliette
ERICA DURANCE
Lois Lane on Smallville

This bird, a plane, it's the sexiest, sassiest, shrewdest Lois Lane since Margot Kidder. Smallville was tidy to travel her front and heart last season. Here's hoping they maintain her self
ELIZA DUSHKU
Echo on Dollhouse

The stripped promo wound for the initial season of Fox's Dollhouse got our concentration, and now we have the glee of wondering what costumes she'll smash hearts — and bones — in for season 2.