If David Duchovny's Mulder and Gillian Anderson's Scully were the heart and soul of The X-Files, then William B. Davis' Cigarette Smoking Man was its blackened lung. Indeed, Davis' ominous presence was as vital to the supernatural drama as black oil, alien implants, and Scully's skepticism, and that makes the actor's failure to score an Emmy nod yet another of the show's mysteries we'll probably never figure out. —Michael Slezak