This creature is called a CYBERMAN from the british sci-fi tv show Doctor Who. Im looking forward for the "Nightmare in Silver" (s07e12) episode because it's written by Neil Gaiman, awesome writer.
I dont actually like the cybermen as villains, though they're terrifying in "doomsday" episode for converting humans into their specie. I just draw one because of its metalic/silver skin, great way to practice again in using lead as a medium.
by the way, at the lower right is my signature, that's actually my name in Gallifreyan