Tonight is the 2-hour premiere of SyFy's new series, Defiance. Earth has been invaded by seven -- count them! -- SEVEN alien races who have devastated the planet. This one just might be different from all the other post-apocalyptic series in that it doesn't spell everything out. Viewers are meant to learn gradually about the world of the show, figuring it out a bit at a time. Remember the 2-hour premiere of BSG? Dozens of interconnecting vignettes, huge cast of characters, half-understood conversations and actions. Then by the end of the first season, every scene in that premiere was not only understandable but significant. It looks as if Defiance is aiming for the same thing.

Boy, do I sound desperate for a good SF series!