After being struck by a truck, John Corben wakes up alone in an abandoned apartment as a man-machine with a Kryptonite heart. Corben realizes he now has superhuman strength and sets out to exact revenge on the Red-Blue Blur, who he perceives to be an irresponsible vigilante.
Against Clark's wishes, Lois involves herself in the Red-Blue Blur's investigation, and winds up getting kidnapped by Corben.
original airdate--October 2,2009 rating--2.24 million
songs--Theme song--"Save Me" by Remy Zero
Antagonist: John Corben
Goof: When Metallo picks up the picture of the woman, it should be blood stained on the back as it was in his pool of blood. Yet it is mostly clean on the back.
Trivia: Brian Austin Green, who portrays Metallo, was recently on Terminator: The Sarah Connor Chronicles, where he fought Terminators. In this episode, Lois Lane refers to him as "a real-life Terminator".