Here are EW's picks of the dozen guys who brought the most heat to roles in science fiction movies and TV during the past year, from Jensen Ackles to Zachary Quinto.
Spock in Star Trek
As EW critic Owen Gleiberman said when writing about J.J. Abrams' Star Trek: Quinto does a fantastic job of maintaining Spock's calm, no-sweat surface but getting quietly hot and bothered underneath. Or, as EW's Annie Barrett so eloquently put it: I'd like to report that, thanks to Zachary Quinto's relentless Zachary Quinto-ness, I just had my second sexual fantasy about Spock.
also see Sci-fi hotties of '09: The women