Smallville - Season 4 (2004)

The Smallville High cheerleaders are using a kryptonite mixed love potion to seriously change the behavior of their victims.

Clark meets a young man with a power of speed that exceeds his own, but the boy lacks responsibility for his actions. Also, Lex finds a manuscript that appears to be some sort of Kryptonian map.

Lionel Luthor, using one of the Kryptonian stones, attempts to swap bodies with Lex but inadvertently transfers bodies with Clark, leading to him learning a few secrets, including that of Clark's powers.

A mysterious bookie with powers of manipulation has a strange, even dangerous, effect on Clark and his friends. Meanwhile, Lex causes friction by using his influence on Jason and Lana's relationship.

In 1604, in southern France, Lana Lang's distant ancestor Countess Margaret Isabel Thoreau and two other evil witches are condemned to be burned at the stake by Magistrate Wilkins, but Isabel manages to spit her blood on a symbol on a page of their mighty book of spells. In the present day, Lana buys the book on eBay, and by touching the blood-spotted symbol, resurrects the evil countess who possesses her body. Isabel/Lana uses a spell to let the other two witches posses Chloe and Lois. The powerful trio vows to pursue its quest for the three (actually Kryptonian) ...

Lex gets wrapped up in a sex/murder scandal. Clark gets Lionel's help to get Lex out of trouble. Lana meets Jason's mother, whom she has seen before in a dream, which was set in the 1600s.

After an explosion at a LuthorCorp lab, Smallville's citizens "relive" their worst nightmares.

Alicia Baker returns, and with the help of Red Kryptonite, elopes in Las Vegas with Clark. Lana offers a sexual relationship to Jason in an attempt to win him back. Lionel comes back to Lex with a peace offering.

When Lana is attacked in her apartment and Jason in his car by an invisible being, everyone believes that Alicia Baker was responsible, except Clark. However after a series of circumstances, Clark begins to doubt Alicia's innocence to the mysterious attacks. Alicia tells Clark that she'll offer to prove her innocence if Clark reveals his own superpowers, but Clark refuses. So, Alicia secretly shows Chloe the abilities of Clark, expecting people to leave them both alone. But elsewhere, Lois discovers that the real culprit of the attacks is the deranged Tim Westcott ...

Clark is wooed by the offer of a Football scholarship from Metropolis University but faces a dilemma over whether he should accept, knowing he has such an advantage on the field because of his superpowers. Meanwhile, Lois is implicated in the death of a member of the Metropolis University Football team which leads Clark to investigate to clear Lois in which they suspect that the team's idol, named Geoff Johns, may hold a clue. Elsewhere, Lex tries to persuade Lana that Jason's mother had ordered him to try to break her and Jason up for mysterious reasons.

As if Lois Lane didn't make enough of a nuisance of herself now living at the Kent farm, she brings in Einstein, a golden retriever, who is the latest victim to be hit by her car, and she meanly calls him 'Clarky', while Clark, kind as ever, hopes to keep him as a pet if the owner isn't found, which his parents hope. Clark soon finds out it's a surviving dog of an experiment to give canines superpowers with daily injections of steroids mixed with meteorite fragments (kryptonite) produced at LuthorCorp, which Lex insists to Clark that the project was abandoned after ...

The Kryoptonian metallic disc is returned to Clark following the death of Virgil Swann. Placing the disc in the cave reveals a message from the spirit of Jor-El instructing Clark to find the three Kryptonian knowledge crystals and unite them before others find them and use them to self-interest. The message goes on to tell Clark that allowing a human to assemble the crystals could lead to the destruction of Earth. The first stone, retrieved by Lex in Egypt in the season opener, is in Clark's possession in the cave. The second is apparently in possession of the late ...

When Jason arrives at Lana's apartment at The Talon, they see that is was broken into and wrecked. They discover that the magical stone they took from the Chinese temple is gone. Lana implores Jason to leave it, and concentrate on their romantic relationship instead. But the two meet at Lionel's office, who strongly denies any knowledge of the theft and accuses his son Lex, who makes another innocence-claimant. Meanwhile, the Kent farm gets an uninvited guest's guest: Lois Lane's younger sister Lucy, a violinist who left her fancy Swiss boarding school. The Lane girls...

An experiment with heated (black) kryptonite at Luthorcorp causes an explosion which badly wounds Dr. Sinclair, the scientist in charge, and creates a molecular copy of Lex which has the evil side of his personality. While the real Lex shows Clark the experiment was to create far stronger crops, the evil one gives Sinclair a fatal injection in hospital after questioning him. Fearing an effect on himself, 'Evil Lex' locks the good Lex up wearing an iron mask and sets out ruining lives in Smallville, such as closing The Talon when Lana refuses to be his girlfriend, and ...

It's the day before the Smallville High Senior Prom and would-be Prom Queen, Dawn Stiles, crashes her car down a cliff into a pile of meteor rocks. Her spirit separates from her body, but she quickly discovers that she can inhabit other people's. Her new found talent leads her first to Martha Kent, then to Lana, next to Lois, and finally to Chloe, who is a surprise late nominee for Prom Queen thanks to Clark entering her as an alternate nominee. Meanwhile, the dead body of Bridgette Crosby is found on the grounds of Lex's mansion, and Jason suspects he had something ...

Kevin Grady commits thefts and uses his superpower to delete the incident from witnesses' minds. When he does so with Clark who stopped him after robbing The Talon, much more memory gets wiped, so Chloe must take super-boy home to the Kent farm and help him remember who he is, including discovering together the amazing extent of his superpowers and his feelings for Lana Lang. Meanwhile Lana tells Jason she's neither sure she still wants to go to college nor to stay his girlfriend, claiming it's not Clark but their complicated past, he walks off angry, warning she ...

In the middle of the night on the road, a young pregnant woman is going into labor while the father of her child drives, when she suddenly glows and implodes, while the guy stops the car and runs for his life. Lana and Clark are driving a truck along the same road and find a baby in the crater created by the explosion. They take the baby to the hospital, and the Kent family temporarily guards him, who is connected to Clark. Lana and Clark give the name of Evan, and on the next day, he becomes a teenager, precociously aging. The scientists of Lex study the case and ...

On the last day of Smallville High before graduation, the emotionally disturbed and frustrated photographer of the Torch, Brendan Nash, feels rejected by the Universities and decides to abduct some schoolmates to stay with him forever in a replica of the school. He uses his power of 'Medusa Touch' of turning people into stone by mere touch, and brings Lana, Chloe, and other successful schoolmates to the place. While Clark teams up with the nosy Lois to find the other students, he also talks with Jonathan and Martha over his college choices after graduation. Meanwhile,...

When Lana (possessed by Isobel) kills Genevieve Teague by stabbing her with one of the Kryptonian Knowledge Crystals after she attempts to steal it, it triggers a cosmic event that not only severs Lana's link to the spirit Isobel but also sends meteorites from deep space toward Earth and Smallville. At the graduation ceremony for Smallville High, the military arrives to evacuate the town after news that another meteor shower is imminent. Fearing he has a link to the meteorites, Clark goes to talk to the spirit of Jor-El, who informs him that his only hope is to unite ...