 " Powers , Principalities , Thrones and Dominions " features the final appearance of the character Bob Bletcher . Smitrovich had first portrayed Bletcher in " Pilot " , appearing intermittently throughout the first season . Bletcher was murdered in the previous episode , " Lamentation " . The episode also features the death of Millennium Group member Mike Atkins , played by Robin Gammell , who had also portrayed the character in the earlier episode " Gehenna " . Sarah @-@ Jane Redmond , who had first portrayed Lucy Butler in " Lamentation " , would return in the second season episode " A Room with No View " , and the third season episodes " Antipas " and " Saturn Dreaming of Mercury " . 
