You've heard about Brian Austin Green in the role of Metallo.

You've seen a photo of him in the role.

Now, watch as John Corben (Green) wakes up and finds himself with a Kryptonite heart on this Friday's new episode of Smallville. It's a must-see for any fan of the show...

[video url="http://www.tvfanatic.com/videos/the-making-of-metallo/" title="The Making of Metallo"] [/video]

Matt Richenthal is the Editor in Chief of TV Fanatic. Follow him on Twitter and on Google+.