So I'm not going to make a case for Enterprise as anything but the worst Star Trek show, but it sure did have the hottest Vulcan. Commader T'pol, as played by Jolene Blalock, was the original Enterprise's science officer, and in the Trek canon is the first Vulcan to ever serve an extended period on a human spaceship. Her science chops are second to none, but what really got her on this list was her seasons-long experiments with Trellium-D, a compound that could unlock hidden emotions in her normally stoic race. Messing with your brain for science is hot.