8.00 - Smallville Season Eight

Oliver tells Clark he must kill Davis, as Doomsday is a serious threat and must be stopped at all costs. However, Clark struggles with taking a human life, so the Green Arrow and his team decide to take matters into their own hands. Lois takes on Tess, but the fight takes a shocking turn. Meanwhile, Chloe gets caught in the middle of Oliver and Clark's battle over killing Davis.

Chloe returns and begs Clark to kill Davis, claiming he can no longer keep the beast under control. Tess has assembled a team of meteor freaks, including Plastique (recurring guest star JESSICA PARKER KENNEDY), to track down Davis so Clark can kill him. However, things get out of hand once Tess' team discovers she is double-crossing them.

Clark discovers that Davis is still alive and confronts Chloe about protecting him. Oliver discovers Jimmy breaking into Chloe's apartment, and things rapidly get worse after Davis jumps from the shadows and attacks both of them. Plus, Davis asks Chloe to leave town with him.

Lois believes that she needs a big story to secure her reputation as a reporter but the red-blue blur continues to elude her. However, after Chloe is mugged, Lois steps in to fend off one of the attackers and uses the opportunity to pretend a new superhero, Stiletto, has come to town and is giving exclusives to herself.

Tess tries to kill Davis by blowing up his truck. However, after he escapes, she realizes she needs help to destroy him and turns to Clark. Tess reveals Davis' secret childhood with the Luthors and hints that she knows Clark's true identity. Meanwhile, Davis runs to Chloe for help.

At Chloe's birthday party, a mysterious magician named Zatanna (guest star SERINDA SWAN - "Psych," "Supernatural") grants Chloe's wish to be more like Lois and switches the two into each other's bodies. Zatanna searches for her father's book of spells so she can conjure up his spirit, but not before also granting Clark his deepest wish.

Tess invites Clark to a press conference in New York, but when an explosion rocks the private jet they are on, Clark must figure out how to save them without Tess learning his secret. Unbeknownst to Clark, Tess orchestrated the explosion to get Clark to reveal his powers. Meanwhile, Davis discovers a surprising way to control the monster within.

An explosion at LuthorCorp kills all the board members and injures Oliver, who was there to announce the merger of his company with LutherCorp. Oliver believes that Lex is responsible for the blast, but Clark and Lana (KRISTIN KREUK) learn that the bomber is Winslow Schott (guest star CHRIS GAUTHIER "Eureka"), a toymaker and former Queen Industries employee with a grudge against Oliver

Clark finds Tess in Lana's (KRISTIN KREUK) ransacked apartment and realizes Lana is missing. Tess tells him Lex is still alive and may have kidnapped Lana and finally reveals the truth about what happened to Lana after she awoke from her Brainiac-induced coma. Meanwhile, Tess breaks into a secret LuthorCorp facility and is shocked at what she discovers. Directed by series star ALLISON MACK.

Clark discovers John Jones (recurring guest star PHIL MORRIS) was shot while working as a police officer, so Clark dons the uniform and goes undercover to find the culprit. Meanwhile, Lana (KRISTIN KREUK) 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.

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, the Persuader (guest star FRASER AITHCHESON - "Kill Switch") appears and attacks him. Rokk (guest star RYAN KENNEDY - "Whistler," "The Invisible"), Imra (guest star ALEXZ JOHNSON - "Instant Star," "So Weird," "Final Destination 3") and Garth (guest star CALUM WORTHY - "Supernatural," "Psych") -- 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.

It's the day of Chloe and Jimmy's dream wedding. Chloe is excited that she's marrying Jimmy but is worried that Davis will stop the wedding. Meanwhile, Oliver tells Clark he thinks he has discovered where Lex is hiding and takes off to Cuba to confront him. When he arrives, however, Oliver is shocked to find Lana (former series star KRISTIN KREUK) instead. Clark and Lois grow closer but chaos ensues when Doomsday crashes the wedding and tries to kidnap Chloe.

Clark receives an anonymous package containing the crystal that Tess found in the Arctic. When he removes the crystal, it activates and sends him and a visiting Lois to the Phantom Zone where they run into Kara (recurring guest star LAURA VANDERVOORT). Kara opens a portal for Lois to return but Zod's wife, Faora, escapes with her and takes over Lois' body. Faora goes on a rampage in Metropolis.

Chloe's memories begin to fade one by one until the only person she remembers is Davis. Clark realizes that it is the work of Brainiac that is erasing Chloe's memories and the only way to stop the brain interactive construct from taking over her mind is to rebuild the Fortress and ask Jor-El to heal her.

Jimmy snaps a picture of Clark super-speeding to save Lois from a mugger and manages to catch a red and blue blur on film. Jimmy shows it to Tess who decides to run it on the front page of the Daily Planet. Clark fears his identity will be discovered so he asks Chloe to run interference with Jimmy, but she refuses.

Clark looks into a recent attack in a theater that may be the work of a serial killer. Suspecting it could be someone who is meteor-infected, he demands that Chloe release the names of the people she is counseling at the Isis Foundation, which causes a rift between them. Davis fears that his blackouts could mean that he is the serial killer and collects evidence that may implicate him. Fearing the worst, he confesses his suspicions to Chloe.

After leaving their engagement party, Chloe and Jimmy are abducted by a psychotic jeweler. Once emotionally scarred by his wife's infidelity, the jeweler now kidnaps couples and subjects them to a kryptonite-enhanced lie detector that will shock them if they lie. Chloe is asked if she is in love with anyone else. Meanwhile, in an effort to find Chloe and Jimmy, Clark and Lois pose as a couple -- as such, they are then kidnapped and asked how they feel about each other.

Tess and her team perform tests on Clark's crystal that she retrieved from the Arctic, causing it to send a beam of light into the universe. This triggers the arrival of DC Comics' Maxima (guest star CHARLOTTE SULLIVAN - "M.V.P.," "Across the River to Motor City," "The House Next Door"), a queen from the planet Almerac, who is searching for her soul mate and believes this is who sent the signal. Unfortunately, Maxima's power is too great for mortal men and her kiss kills them. As the seductive Maxima arrives in Metropolis, she begins her search, starting with Jimmy.

Oliver collapses at a charity event and reveals he only has 24 hours to live. Clark and Chloe call Davis for help but his prognosis is grim. Delirious, Oliver flashes back to when he was stranded on an island and first learned how to use a bow and arrow. He also recalls meeting Tess for the first time on that island after she had been kidnapped by a drug runner. Meanwhile, Chloe decides to use her new powers to help save Oliver, shocking Clark.

It's Clark's first day at the Daily Planet with Lois, and the pair are immediately thrown together on a story when a bus explodes outside the office. Clark rescues Bette (guest star JESSICA PARKER KENNEDY - "Another Cinderella Story," "Kaya"), a young girl who bonds with Chloe over their shared meteor abilities, but Bette is hiding a big secret. Paramedic Davis Bloom (series star SAM WITWER) arrives in Metropolis and is drawn to Chloe.