With Clark banished to the Phantom Zone, Metropolis is in shambles as the city riots, and Chloe & Lionel plot to rid Lex of General Zod...one way or another.

One of the Phantom Zone escapees is up to no good in the local forest. Clark is jealous of Chloe's new boyfriend from the paper. Meanwhile, Lana and Lex finally sleep together and Lois falls in love with Oliver Queen, Martha's benefactor.

Clark is thrilled when he learns that his friend, Raya, managed to escape from the Phantom Zone and has come to see him in Smallville. The two grow close and Raya shows Clark how to restore power to the Fortress of Solitude. However, Baern, the spirit of a killer with the ability to control and feed off electricity, also has escaped from the Phantom Zone. After possessing the body of a street kid in Oakland, California, Baern makes his way to Smallville to take revenge on both Raya and Clark for his imprisonment. Meanwhile, Lana gathers more information about Lex's research project called ROCK. Also, Jimmy Olson returns to try to win back Chloe's affections by tailing Lana to find any dirt on Lex Luthor.

Lex is targeted by a former Belle Reve patient who can move through frequency, and who wants him to come clean about 33.1. Meanwhile, Clark goes to Seattle to hunt down one of the Phantom Zone escapees.

An illegal immigrant from the Mc Nally farm seeks Clark's help. He then uncovers a sinister secret in the farmer's cornfield which has been hidden since the last meteor shower.

The Daily Planet's gossip queen Linda Lake uses her ability to transform herself into water to find the dirt on people and run her weekly saucy story, however detrimental for them. After bringing out baseball star Mike Dawson is doped, Lake drags him into a fountain pond staging suicide, which fan Jimmy Olsen convinces Chloe can't be true. Next Linda overhears Chloe and Lana about her doubts to accepts Lex's marriage proposal because she is not quite over Clark and prints it, to Lex's despair and making Clark realize he's not quite over Lana either. Lex promises Linda any price to find something against Clark, and Chloe has a hard time keeping his being Kryptonian secret, while it makes her furious that people tells her their secrets while complaining when refused another's secret. When Lois tells Clark she suspects Olliver of being the Green Arrow after seeing he has an arm wound at the same spot, but wants him to be innocent either way, he finds an original way to help both friends while she gets Jimmy to help her set a trap for Ollie. Lex is prepared to wait for his pregnant lover...

Clark once again becomes "under the influence" of red kryptonite, and will say his true feelings on such things as Lionel and Martha's relationship, and Lana's pregnancy, but there may be someone else that will get affected by the red k.

After receiving a photo of herself dressing in her room, Lana realizes she has a stalker. After hiding out in Chloe's apartment above The Talon, Lana decides to hide out at another surprising location: the Kent farm so Lana can try to find out more about Clark as she grows more suspicious of his abilities. Meanwhile, Jimmy helps Clark try to find Lana's stalker in which he eventually breaks up with Chloe because he believes she isn't truly over Clark, forcing Chloe to take a deep look at her feelings for her best friend.

A boy who got blind during the meteor shower has developed the power to spot other meteor infected people, and Chloe is revealed to be one of them. Meanwhile, Lana closes in on Clark's secret.

After a secret meeting with Lionel, Lana is shot at the Daily Planet by a mysterious gunman. Jimmy is knocked out while studying photographs of the scene and dreams about a 1940, black-and-white version, of Smallville. Jimmy finds himself playing the role of a reporter with Chloe his secretary, and a bumbling Clark also works there, as his sidekick. Jimmy's investigation leads him to Lana, who turns out to be a very evil femme fatale who plans to orchestrate the murder of her tycoon husband Lex by using Jimmy as the patsy. Jimmy's research further takes him to a notorious nightclub owned by Lionel Luther, and Lois is a sultry singer working at club who is having a fling with Lex to help him orchestrate the murder of Lana. Meanwhile, back in 2007, Clark discovers why Lana married Lex after Chloe learns it from Lana. Also, Lois further meddles in the shooting case by stealing a silver-lined cigarette case which holds a clue.

When Clark Kent confronts Bizarro, the last wraith from the Phantom Zone, the ensuing fight causes the dam to break, unleashing a torrent of water.

Clark and Lois discover Kara's spaceship but before they can open it, Kara appears and knocks Lois out. Clark is shocked after Kara tells him she is there to protect baby Kal-El. Despite Kara's appearance, a despondent Clark decides that without Lana there is nothing keeping him in Smallville, and heads to the Fortress of Solitude to begin his training as a superhero. However, Jor-El tells him Kara's father- Zor-El, who is Jor-El's brother- is evil and Kara is dangerous, therefore Clark must stay in Smallville to find out why she came to Earth. Lex makes a stunning discovery regarding Lana and Project 33.1.

Kara desperately wants to make friends and fit in on Earth, but Clark tells her to keep a low profile until she can get her powers under control. Despite his warnings, when Smallville's annual "Miss Sweet Corn" beauty pageant comes around, Kara signs up and meets the competition; Tyler, Carly, and Tempest, three meteor-infected vixens who plan to use their powers to steal a treasure map to the hidden Smallville time capsule. Meanwhile, Lana returns to Smallville and wants to re-start whatever romance she had with Clark. In Metropolis, Agent Carter interrogates Lex in his further search for Kara's missing spaceship, while Chloe and Jimmy clash with the vain and egotistical Grant over the developing story in Smallville.

Lex hires Dr. Curtis Knox who claims that he can "cure" someone from being a "meteor freak," changing their lives. Chloe takes an interest in this, but Dr. Knox may have another secret as Clark finds out that Dr. Knox is an ageless immortal who needs blood from kryptonite-infected people to keep his young wife eternally young. Meanwhile, Kara makes an alliance with Jimmy to find out where her spaceship crystal is being held, while John Jones warns Clark that Kara is dangerous and tells him to find the Kryptonian crystal before Kara does. Elsewhere, Lana secretly watches Lex through her Isis Foundation to help meteor freaks.

The residents of Smallville are thrilled when "Warrior Angel," a movie based on a comic book, begins shooting in town. However, after the lead actress, Rachel Davenport takes off in stunt car with cut brakes, Clark must step in to stop the runaway car. Unfortunately, an obsessed fan witnesses this heroic event and decides Clark is a real life superhero, whose girlfriend Lana must be eliminated so Clark can fulfill his destiny. Meanwhile, Lex discovers Lionel at the cabin.

Clark learns Kara is in Washington searching for the crystal. Kara is captured after she breaks into the lab and sedated with a kryptonite-infused truth serum. The serum causes her to relive a prior trip to Earth when she followed Clark's biological mother, Lara, to the Kent farm. Clark arrives in time to save her but, searing the machine with heat vision, he also falls victim to the serum and sees what Kara sees: his mother.

Kryptonite and high voltage mix during a lightning storm -- causing Lana to absorb Clark's powers. Using her newfound super powers, she breaks into Lex's safe and steals incriminating evidence -- which she then delivers to Lois and Grant, demanding they run a story exposing Lex's secrets. After Grant refuses to use stolen material, Lana decides to take care of Lex...herself. Clark tries to stop Lana from killing Lex...and a super battle ensues between the two!

Clark hears the voice of his biological mother, Lara, calling for help from Kara's crystal and decides to release her, despite Jor-El's warnings. Lara and Clark reunite and she gives him Jor-El's ring, which contains blue kryptonite. As Clark puts it on, he realizes Zor-El manipulated the whole thing and that blue kryptonite strips him of his powers, enabling Zor-El to take control of the Fortress of Solitude. Meanwhile, Chloe and Lex each discover Lois and Grant have been seeing each other and warn them to stop.

As Christmas draws near, Lois receives a call from an anonymous man claiming that Chloe is attached to a bomb, and the only way he won't let it blow is if she reports the truth of Lex's atrocious experiments about the mysterious 33.1. Lois tries to find a way on her own to stop the mysterious person who is linked to both Lex and Grant Gabriel. Chloe and Jimmy end up getting stuck in an elevator at the Daily Planet with the bomb ticking, prompting Chloe to reveal her secret meteor-rock power of healing to him. Meanwhile, Clark returns from his enforced imprisonment from the Fortress of Solitude. With Kara still missing, Clark uncharacteristically wants Lana to re-open her Isis program of spying on Lex with the intent of taking him down, and wants to become closer to Lana when he has been distancing himself from her. But what exactly does 'Clark' have in mind?

While Clark is still frozen in the fortress, Bizarro grows closer to Lana, who returns the feelings on just as deep a level, even sharing some badly-needed information with him while he still attempts to carry out his intentions of destroying Clark. Lex's brother, Julian, reveals himself to Lionel in an effort to clear the air between all parties involved.

Oliver returns and enlists Chloe in his vendetta against Lex, but a sexy new 'superhero' stands between Oliver and his mission, even if Lex is, ultimately, one of the bad guys.

Clark is convinced that he can find his cousin's whereabouts if he can get into Lex's mind, who's just been shot by the man holding Kara and Lois prisoner.

Pete Ross returns to Smallville and finds a number of surprising changes since his departure four years earlier. Besides resolving his feelings toward Clark since he learned of his friend's secret, Pete has to deal with the acquisition of a superpower of his own: that of his ability to 'stretch' his body courtesy of kryptonite-laced gum he's been chewing and consuming for nearly a year. Meanwhile, Lex continues to sow seeds of anxiety into the amnesiac and powerless Kara over Clark as well as wanting to know about her past, as does Jimmy Olsen.

Lionel kidnaps Clark and holds him in a kryptonite-lined cell at a Luthorcorp facility; Chloe and Lana confront Lionel, who blames Lex, and they then take Kara to the Fortress and plead with Jor-El to restore her memory so she can save Clark.

When Brainiac ends up in a confrontation with Clark after trying to coerce Kara into joining him, he takes it out on Lana.

Despite his father's warning, Lex still finds himself in a power struggle from within over the secret to The Traveler...with some deadly results.

All in one night, the Feds try to head off Chloe, who's hacking into top secret computers, convince Jimmy Olsen that she's a terrorist, and ground Lex, preventing him from flying anywhere.

Clark is shown by Jor-El what life on Earth would have been like, had he not sent him there instead of facing the doom of his fellow Kryptonians.

When a member of the Veritas clan attacks in his name and carves Kryptonian symbols in the victim's chest, Clark stands by his principles in hurting no human being, even though the victim is Lex Luthor

Clark feels that Kara is under the effects of red kryptonite when he discovers that she is the reason for the plane containing the last member of the Veritas exploding. Lex is directed to look for answers surrounding the traveler in the Arctic Circle, where Clark's Fortress of Solitude rests.

It's been four weeks since the Fortress collapsed and Clark disappeared. Green Arrow calls upon Black Canary and Aquaman to locate the missing Clark Kent. Clark, in the meantime, is powerless and residing in a Russian prison camp in Siberia. With Lex Luthor missing and presumed dead, a new ruthless CEO, named Tess Mercer, is appointed the head of LuthorCorp and moves into Lex's mansion with her own dark plans for Clark and Metropolis. Chloe is kidnapped by a clandestine group that has discovered her special powers and they want to test the limits of those new powers by locating Green Arrow and his friends.

Clark's first day on the job at the Daily Planet begins with a bus exploding right outside the building, which leads him and Lois on a trail of someone who might be infected by kryptonite. Chloe finds a runaway teenage girl, named Bette, whom Chloe suspects is involved in the explosion when Bette (whom will later become the fire-starter Plastique) has the meteor-rock power of pyrokinesis. In the meantime, Chloe also meets a local medic, named Davis Bloom, who takes an interest in her, even though she's engaged to Jimmy Olsen. Elsewhere, Tess meets Clark for the first time as she takes over the Daily Planet in Lex's absence and immediately senses something not right about him.

Oliver Queen is poisoned at a charity fundraiser and Clark races around the world to find a cure.

When Tess inadvertently activates the mysterious Kryptonian Knowledge crystal found in the Artic, it emits a high-band beacon which summons an alien queen, named Maxima, who arrives on Earth and begins a search for her new mate, with a kiss that is too strong for humans to survive. Meanwhile, after just moving in together, Jimmy finds a letter that Chloe wrote for Clark that revives Jimmy's insecurities.

After Jimmy and Chloe disappear from sight for a bit and it turns out it has been against their will, Lois and Clark pose as a couple to flush out the kidnapper.

A serial killer is on the loose in Metropolis, and Clark always seems to be one step behind him, while Chloe's paramedic friend seems to think he blacks out and performs the dirty deeds, himself.

Jimmy takes a photo of Clark using his super-speed while saving Lois from danger, but it comes out blurred. Tess decides the story should make the front page for the Daily Planet exposing the mysterious new 'superhero' that. Chloe refuses to continue helping Clark protect his secret, so Clark turns to Oliver for help when Jimmy gets too close to discovering his secret. Meanwhile, Lois meets Sebastian Kane, a new reporter at the Daily Planet, who has the power to see peoples' memories by merely touching. He has been hired by Tess to find the missing alien crystal.

Clark receives a crystal that sends him and a visiting Lois to the Phantom Zone where they run into Kara. Kara tries to open a portal for Lois before it's too late but Zod's wife, Faora, manages to escape in Lois's body and proceeds to go on a rampage through the streets of Metropolis.

When Chloe begins having memory loss when the essence of Brainiac begins replacing her memories with Kryptonian codes, Clark decides to use the Crystal of Knowledge to reconstruct the Fortress of Solitude and ask the spirit of Jor-El for help. Meanwhile, Jimmy begins to worry about Chloe's well-being, while Davis, disturbed by the knowledge that he may have alien origins, begins to become drawn to Chloe.

Oliver gets a step closer to finding Lex, but Clark refuses to help for the time being, due to Chloe's special day, while Lois finds she has special feelings for Clark, who has a surprise (or two) waiting for him at the wedding reception.

The aftermath of Doomsday's attack on Chloe and Jimmy's wedding leaves Clark in shock, but before he can search for the kidnapped Chloe, an evil being, known as The Persuader, appears and attacks him. Rokk, Imra and Garth, also known as The Legion, step in from the future to help vanquish the Persuader and the group realizes Brainiac has taken over Chloe once again. Meanwhile, up at the Fortress, Chloe, as Brainiac, informs Davis he is Doomsday and was created to kill "the other Kryptonian" and destroy the world.

Clark discovers John Jones was shot while working as a police officer, so Clark dons the uniform and goes undercover to find the culprit. Meanwhile, Lana confronts Tess and tells her Lex isn't the man she thinks he is. Lana's shocking news forces Tess to reevaluate her position as the head of Luthorcorp.

Clark and Chloe search for Lana, who has it in her head that things will be better between her and Clark if they were on "a more-even keel," and goes off on her own in search of a suit developed by Luthor, Corp. that will make her invincible.

There is an explosion at Luthorcorp when Oliver is about to announce he controls the interests of Luthorcorp. Oliver suspects Lex is behind the explosion but he realizes the bomb was made by an ex Queen Industries' employee called Winslow Schott. Lana learns her power suit gives her the power to absorb Kryptonite.

Linda Lake comes back to Smallville and blackmails Clark to expose his true identity. However, Clark decides he will reveal his secret by himself. A fanatic teenager fakes a fall so Clark can save her.

Tess devises a plan which will reveal Clark's true identity, while Davis comes up with a plan to ease the demon within him, but finds himself trying to scramble after Jimmy sees him kill someone.

Reflecting on her status in life, Chloe finds that she's not all what she dreamed of becoming, so when a magician asks her to make a wish, little did she dream of it coming true...becoming Lois.

All signs point to the fact that Clark was not the only one that landed on Earth the day of the meteor shower in Smallville.

Chloe and Lois are attacked by two thugs which one of them is hit by Lois with her heel, she starts feeling a bit heroine about it so she recruits Jimmy for the picture so she can convince the people she is Metropolis' new hero, with the name of 'Stiletto', so she can take away the famous red and blue blur. However, Lois may end having contact with this red and blue blur when Clark wants to try to track down the mysterious 'Stiletto'. While Clark tries to help Chloe recover her stolen laptop computer with all of the Justice League's files on it, she continues to hide Davis in the basement of The Talon. Elsewhere, Jimmy is working as a bartender at a nightclub where the thugs who robbed Chloe and Lois reside and are plotting to kill Stiletto to reclaim the city for themselves.

Davis asks Chloe if she can go away from the city with him, but when Clark realizes Davis is alive, he confronts Chloe to give him an explanation about it. Meanwhile, Oliver discovers that Jimmy has become a pill-popping junkie and offers his services and emotional support. But Jimmy is too consumed by his anger and paranoia and brushes off Oliver. Later, when Oliver sees Jimmy breaking into Chloe's apartment to steal money and items to buy more drugs, things get worse when Davis appears and attacks them both. It leads to an angry Clark tracking down Davis/Doomsday to the ruins of the Fortress of Solitude for a brutal confrontation.

Chloe mysteriously returns to Smallville where she gives Clark the idea of killing Davis by telling him he can't keep the beast under control. Unknown to Clark, Tess has gotten together a kill-team affected by meteor rocks to track down Davis so Clark can kill him, but things get out of control when Tess' team discovers that she betrayed them. Meanwhile, Oliver, as the Green Arrow, agrees to help Clark look for things that can stop Davis by breaking into Tess' safe at the mansion to steal some black Kryptonite hoping to separate the two entities apart, while Chloe is revealed not who she appears to be, and Tess is working for another greater power beyond everyone else.

Clark tells Oliver that he must kill Davis, but Clark deals with the fact that he can't take a human life. This leaves the justice league to take the affair on their own hands. Then, Rokk Krinn teleports from the 31st Century to give Clark another Legion time-traveling ring so Clark can exile Davis/Doomsday to the future. But in a surprising twist, Lois confronts Tess about her nefarious plans involving a mysterious crystal and in the fight, Lois accidentally finds Rokk's ring, and gets zapped into the future. Meanwhile, Chloe gets in the middle of Clark and Oliver's fight about Doomsday's human carnage, in which Dianah/Black Cannary and Bart/Impulse intervene. Jimmy finds out Clark's identity, leading to a fateful showdown when Clark attempts to use black kryptonite to split Davis from Doomsday and seal the beast in a large hole in the ground. But nobody is prepared for what Davis will do afterwords.

The story of Clark Kent culminates in this two-hour series finale as Clark takes the last step to becoming the Man of Steel.

Clark tells Oliver that he must kill Davis, but Clark deals with the fact that he can't take a human life. This leaves the justice league to take the affair on their own hands. Then, Rokk Krinn teleports from the 31st Century to give Clark another Legion time-traveling ring so Clark can exile Davis/Doomsday to the future. But in a surprising twist, Lois confronts Tess about her nefarious plans involving a mysterious crystal and in the fight, Lois accidentally finds Rokk's ring, and gets zapped into the future. Meanwhile, Chloe gets in the middle of Clark and Oliver's fight about Doomsday's human carnage, in which Dianah/Black Cannary and Bart/Impulse intervene. Jimmy finds out Clark's identity, leading to a fateful showdown when Clark attempts to use black kryptonite to split Davis from Doomsday and seal the beast in a large hole in the ground. But nobody is prepared for what Davis will do afterwords.

After a secret meeting with Lionel, Lana is shot at the Daily Planet by a mysterious gunman. Jimmy is knocked out while studying photographs of the scene and dreams about a 1940, black-and-white version, of Smallville. Jimmy finds himself playing the role of a reporter with Chloe his secretary, and a bumbling Clark also works there, as his sidekick. Jimmy's investigation leads him to Lana, who turns out to be a very evil femme fatale who plans to orchestrate the murder of her tycoon husband Lex by using Jimmy as the patsy. Jimmy's research further takes him to a notorious nightclub owned by Lionel Luther, and Lois is a sultry singer working at club who is having a fling with Lex to help him orchestrate the murder of Lana. Meanwhile, back in 2007, Clark discovers why Lana married Lex after Chloe learns it from Lana. Also, Lois further meddles in the shooting case by stealing a silver-lined cigarette case which holds a clue.

All in one night, the Feds try to head off Chloe, who's hacking into top secret computers, convince Jimmy Olsen that she's a terrorist, and ground Lex, preventing him from flying anywhere.

Jimmy takes a photo of Clark using his super-speed while saving Lois from danger, but it comes out blurred. Tess decides the story should make the front page for the Daily Planet exposing the mysterious new 'superhero' that. Chloe refuses to continue helping Clark protect his secret, so Clark turns to Oliver for help when Jimmy gets too close to discovering his secret. Meanwhile, Lois meets Sebastian Kane, a new reporter at the Daily Planet, who has the power to see peoples' memories by merely touching. He has been hired by Tess to find the missing alien crystal.

Tess devises a plan which will reveal Clark's true identity, while Davis comes up with a plan to ease the demon within him, but finds himself trying to scramble after Jimmy sees him kill someone.

Lex is targeted by a former Belle Reve patient who can move through frequency, and who wants him to come clean about 33.1. Meanwhile, Clark goes to Seattle to hunt down one of the Phantom Zone escapees.

Lex hires Dr. Curtis Knox who claims that he can "cure" someone from being a "meteor freak," changing their lives. Chloe takes an interest in this, but Dr. Knox may have another secret as Clark finds out that Dr. Knox is an ageless immortal who needs blood from kryptonite-infected people to keep his young wife eternally young. Meanwhile, Kara makes an alliance with Jimmy to find out where her spaceship crystal is being held, while John Jones warns Clark that Kara is dangerous and tells him to find the Kryptonian crystal before Kara does. Elsewhere, Lana secretly watches Lex through her Isis Foundation to help meteor freaks.

After receiving a photo of herself dressing in her room, Lana realizes she has a stalker. After hiding out in Chloe's apartment above The Talon, Lana decides to hide out at another surprising location: the Kent farm so Lana can try to find out more about Clark as she grows more suspicious of his abilities. Meanwhile, Jimmy helps Clark try to find Lana's stalker in which he eventually breaks up with Chloe because he believes she isn't truly over Clark, forcing Chloe to take a deep look at her feelings for her best friend.

Clark is thrilled when he learns that his friend, Raya, managed to escape from the Phantom Zone and has come to see him in Smallville. The two grow close and Raya shows Clark how to restore power to the Fortress of Solitude. However, Baern, the spirit of a killer with the ability to control and feed off electricity, also has escaped from the Phantom Zone. After possessing the body of a street kid in Oakland, California, Baern makes his way to Smallville to take revenge on both Raya and Clark for his imprisonment. Meanwhile, Lana gathers more information about Lex's research project called ROCK. Also, Jimmy Olson returns to try to win back Chloe's affections by tailing Lana to find any dirt on Lex Luthor.

An illegal immigrant from the Mc Nally farm seeks Clark's help. He then uncovers a sinister secret in the farmer's cornfield which has been hidden since the last meteor shower.