Below is an image of Brian Austin Green, last seen on Terminator: The Sarah Connor Chronicles, in character as Metallo. Green will play Metallo, the man with a heart of Kryptonite and Superman nemesis, in at least two episodes of TV's Smallville starting September 25th of this year. Now before anybody starts down the line of thinking that it appears to be a rip of Robert Downey Jr. in Iron Man, remember that Metallo in the Superman universe predates the origins of Iron Man. Iron Man, if anything, was inspired by Metallo. Oh, and did you notice the left arm (his left, your right)? Looks like they'll be keeping the character close to the comic version.