Baby Clark (Kal-El) arrives on Earth. Teen Clark starts high school, saves Lex's life after a car accident, and finds out about his past and birth parents.
Bug-lover Greg has an accident involving meteor rocks and his own insect collection, giving him creepy insect characteristics and powers. Lana is endangered when Greg decides that she is the perfect mate to start a colony.
When Coach Walt Arnold's football legacy is threatened by a cheating scandal, the coach entices Clark onto the team. Meteor Rocks in the coach's sauna infects him with the ability to generate fire, and his enemies start getting burned.
Clark discovers that he has X-ray vision, but struggles to use it properly. Meanwhile, shape-shifter Tina Greer robs a bank impersonating Lex Luthor, and then decides that she wants to become Lana Lang - permanently.
Obnoxious athlete Sean Kelvin drowns in an icy, Meteor Rock-infested lake, and is resurrected with an intense need for body heat. He freezes his old girlfriend to death and sets his sights on Chloe.
Lana befriends Harry, an elderly murderer living incognito in a nursing home. He falls into a Meteor Rock pond and regains his youth. Harry starts killing descendants of the jurors who convicted him, one of whom was Jonathan Kent's father.
Overweight teen Jodi submits to a diet of meteor-infected vegetables from her father's greenhouse. They magically make her thin, but she has an intense craving for body fat. Anyone in her vicinity is in danger, including her date, Pete.
Earl Jenkins claims that his violent shaking disease was a result of illicit experiments on Level 3 of Luthorcorp. Lionel denies that it exists, so Earl takes a plant tour group hostage. Lex offers himself in exchange for the hostages.