Found some pics online of the Imperious Leader mask from the original Battlestar Galactica show, it was a character that was always pretty hard to see, to work out what it actually looked like. There were rumours that Alien and E.T creator Carlo Rambaldi sculpted the mask but he discounted those rumours when shown the mask at an interview when he said he'd never seen it before. I had the toy, probably one of the crappest action figures ever, it looks like a lizard with an afro cut. The head itself was surrounded by a kind of wire frame, I can't remember the glowing eyes seen in the B&W pic. The Imperious Leader was actually killed in the first Battlestar Galactica film/ Mini Series when his Basestar exploded over Carillon, and was voiced by Avengers star Patrick MacNee, when the Imperious Leader next showed up in Galactica it was also voiced by MacNee.
The above design was from one of the aborted attempts to bring Galactica back to the screen in the late 90's early 00's