Although the concept is really old hat now on television, an elaborate mythology for a series was new back in the early days of The X-Files. Frank Spotnitz, long-time writer and producer of that series, helped develop much of what became a complex storyline of aliens, monsters and religion. He later went on to executive produce its short-lived spin-off, The Long Gunman, as well as Millennium and Harsh Realm, and recently worked on Michael Mann’s Robbery Homicide Division. This past season he helmed his own series, Night Stalker, starring Stuart Townsend.