By Paul Sheehan, Special to the Envelope

No non-HBO cable show has ever been nominated for best drama or comedy series. This year a truly dramatic breakthrough could occur in the drama category: Four of the five contenders could be non-HBO cable shows. Making the list of Top 10 drama series are: Showtime's "Dexter" and "The Tudors" (pictured left and center, respectively), FX's "Damages" (pictured right), and AMC's "Mad Men." The nominees will be unveiled July 17.