A heart attack patient, who is also an escaped convict, transforms into a cyborg with a heart powered by kryptonite.

After running tests on kryptonite to try and neutralize its effects on Superboy, the military accidentally alters it so it has emotional effects on him, making him apathetic.

After the villain Nick Knack escapes from prison, he captures Lana and Andy and probes their minds discovering Superboys weaknesses. Gilbert Gottfried guest stars.

Superboy is put on trial after Metallo overtakes him in court using kryptonite. Can Superboy stop him before it is too late or will he be the one found guilty?

A prison psychiatrist helps Lex Luthor and Metallo escape, all three quickly turning their attention to stopping Superboy once and for all.

Superboy continues to battle the newly formed threesome of Lex Luthor, Metallo and Dr. Odessa Vexman. As their destructive potential continues to rise, Superboy must stop them before it's too late.

Lex Luthor has just hit Superboy with a deadly kryptonite bomb. Now he gloriously recounts in detail how he planned and executed the devious plan, which he feels certain has killed Superboy.