Heavy Metal (Terminator: The Sarah Connor Chronicles) - Plot

Plot

Written by John Enbom, the plot of "Heavy Metal" consists of two non-intersecting storylines.

Suspicious of a redirected shipment of refined coltan, Cameron, Sarah, and John discover another Terminator (Brian Bloom) hoarding the metal—an essential component of Terminator construction—in preparation for its use in the future war. Dealing with this new threat focuses on John and Sarah's differing tactics; whereas Sarah is more concerned with John's safety and decides they should ignore this new development, John feels that despite the lack of any apparent threat to himself, they have a responsibility to deal with this new Terminator. John ultimately defies his mother and follows the Terminator to a military bunker where it stores the coltan, seals itself (and John) in, and goes into a "standby mode". Sarah and Cameron successfully retrieve John and the coltan, sealing the Terminator inside. After driving the truck with the coltan into the ocean, it's revealed that Cameron kept a bar of the metal without the others' knowledge.

On a Friday evening, Cromartie forces Dr. Lyman, a plastic surgeon, to sculpt his face into the same as another patient the doctor had already treated—unemployed actor, George Lazlo (Garret Dillahunt); after receiving his surgery Cromartie kills the doctor and leaves. The recurring Agent Ellison arrives on the murder scene as it's tied to his previous cases by Cromartie's mysterious faux blood. Investigating the real Mr. Lazlo, his blood does not match that at the scenes, and he is released by the FBI only to be killed and replaced by the doppelgänger Cromartie.