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TRICIA HELFER Number Six on Battlestar Galactica
If the face of the enemy were always this attractive, armed conflict would be a very different scenario. Sure, humanity would still probably get wiped out, but maybe we'd go with a smile on our collective face.
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ZOE SALDANA Nyota Uhura in Star Trek
The brainy and babealicious object of Kirk's unrequited lust only gets hotter once it's revealed she's hooking up with none other than that geek god Spock. Yes, America, it's nerds FTW!
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MOON BLOODGOOD Blair Williams in Terminator Salvation
This robot-annihilating badass makes our adrenaline pump every time we see her — just like her namesake. Here's to a hot career that'll shine brighter than...the sun.
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EVANGELINE LILLY Kate Austen on Lost
It's been a few seasons since we saw Kate sauntering around the beach in her skivvies. But her sexy, tomboy swagger doesn't make it hard to buy that her return to the Island threw a wrench in Sawyer's playing house with Juliette.
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ERICA DURANCE Lois Lane on Smallville
It's a bird, it's a plane, it's the sexiest, sassiest, shrewdest Lois Lane since Margot Kidder. Smallville was smart to move her front and center last season. Here's hoping they keep her there.
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GILLIAN ANDERSON Dana Scully in The X-Files: I Want to Believe
Okay, so the X-Files sequel came out last summer and bellyflopped at the box-office. But Anderson's Scully, with her potent cynicism and stoic faith in science, proved a vision of ethereal beauty in Chris Carter's otherwise bleak and frozen cinemascape. Or, yeah, she was totally hot.
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YUNJIN KIM Sun Hwa Kwon on Lost
We've loved watching our perception of the breathtakingly beautiful Sun go from that of a scared, submissive wife to an adulterous, fiercely loyal survivor. And as anyone who's ever Google Image searched Kim knows, her Sun character's subdued style doesn't even begin to capture this woman's hotness. How do you say ''Cold shower'' in Korean?
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KATEE SACKHOFF Kara ''Starbuck'' Thrace on Battlestar Galactica
It's not easy rising from the ashes of an exploding spacecraft and getting labeled a ''harbinger of death.'' But Sackhoff's Starbuck not only did all that, but she led the human-Cylon joint forces in a kick-ass gun battle and looked sexy as hell doing it.
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SUMMER GLAU Cameron on Terminator: The Sarah Conner Chronicles
You can infiltrate us any times you want, Summer Glau. En. Knee. Time.
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SALLI RICHARDSON-WHITFIELD Allison Blake on Eureka
Some sci-fi geeks will remember Richardson-Whitfield from guest 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 Global Dynamics — the mega-company that employs many of the geniuses that live in the town of Eureka. (She was also woman enough to land Will Smith as a husband — in 2007's I Am Legend, anyway.)
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Is it her sleek, iPod-like exterior? Her warm, glowing eyes? Her ability to transcend electronics and teach our cold hearts to feel love? Eve's got all that plus a potent tale of consumerism and ecological devastation. Hawt!
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ELIZA DUSHKU Echo on Dollhouse
The nude promo shoot for the first season of Fox's Dollhouse got our attention, and now we have the pleasure of wondering what costumes she'll break hearts — and bones — in for season 2.