Clark saves Lana from the tornado, leading Lana to be suspicious of Clark. While protecting Clark's secret, Jonathan gets trapped with reporter Roger Nixon in an underground mausoleum. Lex and Clark search for Jonathan.

When the "hot" new Biology teacher Desiree Atkins (Krista Allen) arrives in Smallville, Clark Kent gets excited in her presence and his hormonal surge sets off a new ability: heat vision. Lex Luthor meets and falls for Atkins and ...

When Dr. Steven Hamilton, physically sick from repeated exposure to meteor rock radiation, causing constant Parkinson-like twitches, becomes a liability to Lex Luthor, he terminates their contract. Dr. Hamilton leaves the mansion ...

Clark gets his Smallville class ring, but these rings contain RED KRYPTONITE making him turn into DARK CLARK.

Lana Lang finds some poems from a secret admirer in the gravestone of her parents in the cemetery. Later, she meets the author, Byron Moore, a weird teenager kept locked by his parents in the basement of their farmhouse. They beli...

At Smallville High School, a swimmer mysteriously ages and dies after meeting his girlfriend Chrissy Parker. The new principal Reynolds arrives and comes into conflict with Clark Kent because he is a friend of Lex Luthor's. Clark ...

A woman appears in Smallville claiming that Clark is her biological son by Lionel Luthor, and she kidnaps Lex to force a confession from Lionel. Clark demands that his parents explain what role Lionel Luthor played in his adoption.

Clark rescues mind-reading Ryan James from a research hospital that treats him like a lab rat. Ryan's guardian doctor sues to get Ryan back, and Clark learns that Ryan has a brain tumor that needs treatment.

Ian Randall is a mentally unbalanced, overachieving student desperate to succeed who gets a 'C' from his stern shop teacher John Frankle. Ian freaks out, duplicates himself and kills Mr. Frankle. The meteor-rock mutant simultaneou...

While practicing motocross with Pete, Clark Kent falls down through a hole in an underground cave and meets a young Native American woman named Kyla Willowbrook (Tamara Fieldman). Kyla is investigating some mysterious ancient pain...

Whitney Fordman returns to Smallville unannounced and receives a hero's welcome from all but Clark who fears his return will put strain on his relationship with Lana. However, all is not as it seems as Whitney begins behaving erra...

When Lex discovers that his father had surveillance devices planted in the mansion, he hires a group of criminals to do the same to LuthorCorp Plaza in Metropolis, unwittingly putting both Lionel and Martha's lives in danger.

Lionel Luthor is shot by an unknown assailant, leading Sheriff Ethan to suspect a drunken Jonathan Kent. As he attempts to prove his father's innocence, Clark learns that Lex and Dominic Senatori have their own motives for killing...

After attending an unauthorized rave in the caves underneath Smallville, Pete and Chloe become infected with a parasite which turns them into adrenaline junkies, threatening to expose Clark's secret and ruin his date with Lana.

Lex locates his long lost half-brother Lucas in Edge City and takes him back to Smallville as part of his plan to overthrow their father Lionel. However, Lex faces betrayal when Lucas decides to side with Lionel instead.

While hiding the spaceship key in the farm's storm cellar, Martha Kent breathes some unknown meteor-rock spores and immediately gets ill. She is sent to Smallville Medical Center under the care of Dr. Helen Bryce, and the results ...

Clark has some weird dreams with the cave and about flying. When he puts the octagonal key in a hole in the wall of the cave, he immediately learns how to decode the symbols. Then, while waiting for Chloe at the Kents' farm, his u...

When the weird and lonely teenager with healing power Cyrus Krupp claims to be an alien, Clark approaches to him trying to know his origins to determine if Cyrus is a Kryptonian alien, or if he's just a crazy meteor-rock mutant wh...

When Lana is assaulted by three drunken customers at The Talon, Clark defends her and ends up throwing the main antagonist onto the new Sheriff's car. The new uptight Smallville sheriff, Nancy Adams, arrests Clark for assault and ...

When a van of Luthor Corp is hijacked by three criminals, Clark accidentally witnesses the robbery. He recognizes the leader of the gang, Eric Marsh, a baseball player of Smallville high school. Unwilling to report his suspicious ...

Lana sees the impossible: a friend named Emily Eve Dinsmore, who died six years earlier in a fatal accident at age 10, and still appears that age. Clark Kent believes Lana and searches for the truth. Emily's father Mr. Dinsmore ha...

As Lex and Helen prepare for their imminent wedding, Clark and Lana navigate their blossoming romance. Meanwhile, linguist Dr. Walden awakens from his coma and sets out to kill Clark Kent, believing him to be a threat to mankind.

As Clark has finally begun dating Lana, Helen Bryce cancels her wedding to Lex after being told to by Lionel. But later, Helen realizes that she loves Lex and they finally get married. Meanwhile, Jonathan and Martha are thrilled t...