<P> This season focuses on Clark Kent as he starts his job at the Daily Planet, begins to accept more of his destiny as Earth's hero, and develops romantic feelings for Lois Lane . While Lex Luthor is presumed dead, and Lana Lang has left Smallville for good, Clark also meets new characters Davis Bloome, Smallville's interpretation of Doomsday, as well as the new CEO of LuthorCorp, Tess Mercer . In other storylines, Clark and Oliver Queen clash over how to handle Lex when he resurfaces, while Chloe Sullivan and Jimmy Olsen take their relationship to the next level . In addition, this season sees the appearance of more DC Comics characters, including recurring appearances from Plastique and members of the Legion of Super-Heroes . </P> <P> Following the end of season seven, it was announced that series regulars Kristin Kreuk and Michael Rosenbaum, who had been with the show since the first episode, would not return as regulars for the eighth season, though Kreuk did return as a recurring guest to conclude her story . while Laura Vandervoort and John Glover departed the series alongside Kreuk and Rosenbaum; Glover was killed off in season seven's "Descent", while Vandervoort was written out of the series after one season but made one guest appearance in this season . Show creators Alfred Gough and Miles Millar also departed the series, allowing Kelly Souders, Brian Peterson, Todd Slavkin and Darren Swimmer to continue as executive producers . This allowed the show to "reinvigorate" itself by introducing new characters and storylines, as well as developing Clark's understanding of his destiny . </P> <P> Averaging 3.74 million viewers per episode, the season out - ranked other high - profile shows on the network, such as Reaper and Gossip Girl . It also received an Emmy Award nomination in the Sound Editing for a Series category . </P> <Table> <Tr> <Th> No. in series </Th> <Th> No. in season </Th> <Th> Title </Th> <Th> Directed by </Th> <Th> Written by </Th> <Th> Original air date </Th> <Th> Prod . code </Th> <Th> U.S. viewers (million) </Th> </Tr> <Tr> <Th> 153 </Th> <Td> </Td> <Td> "Odyssey" </Td> <Td> Kevin G. Fair </Td> <Td> Teleplay by: Todd Slavkin & Darren Swimmer Story by: Brian Peterson & Kelly Souders </Td> <Td> September 18, 2008 (2008 - 09 - 18) </Td> <Td> 3T7451 </Td> <Td> 4.34 </Td> </Tr> <Tr> <Td_colspan="8"> After the collapse of the Fortress of Solitude, Oliver Queen, Arthur Curry, and Dinah Lance set out searching for Clark . At the same time, newly promoted Tess Mercer also begins searching for Lex Luthor . Oliver discovers that Clark is being held captive in Russia, and leaves to rescue him . Chloe is revealed to be in the custody of LuthorCorp, who have been testing her developing powers, which now include super-intelligence . Lex's assistant, Regan, has been using Chloe to locate the members of Oliver's team . Oliver and Clark, who has lost his powers, arrive at the LuthorCorp site and rescue Chloe, Arthur and Dinah . John Jones arrives and restores Clark's powers, at the cost of his own . Afterward, Clark decides that he must leave the farm and pursue a new life, one that is free from the things that have been holding him back from his destiny . Clark starts his internship in the Daily Planet with Lois as his co-worker . </Td> </Tr> <Tr> <Th> 154 </Th> <Td> </Td> <Td> "Plastique" </Td> <Td> Rick Rosenthal </Td> <Td> Don Whitehead & Holly Henderson </Td> <Td> September 25, 2008 (2008 - 09 - 25) </Td> <Td> 3T7452 </Td> <Td> 4.18 </Td> </Tr> <Tr> <Td_colspan="8"> On Clark's first day at the Daily Planet a bomb on a bus goes off outside the building . Chloe helps one of the injured passengers, Bette, and meets paramedic Davis Bloome . Bette, a homeless teenager, stays with Chloe while Davis contacts a friend who runs a shelter for the homeless . Clark discovers that there was no bomb on the bus, but that someone blew it up with their meteor power . Clark and Lois deduce that Bette is the one with the meteor power, and Clark arrives at the Talon to save Chloe before Bette can hurt her . As Bette heads to Belle Reve, Tess stops by and persuades her to join a group of individuals, who also have meteor powers, that Tess has been forming . </Td> </Tr> <Tr> <Th> 155 </Th> <Td> </Td> <Td> "Toxic" </Td> <Td> James Conway </Td> <Td> Al Septien & Turi Meyer </Td> <Td> October 2, 2008 (2008 - 10 - 02) </Td> <Td> 3T7454 </Td> <Td> 4.11 </Td> </Tr> <Tr> <Td_colspan="8"> Oliver collapses at a fundraiser and reveals to Clark and Chloe that he has been poisoned and only has twelve hours to live . Chloe calls Davis, who attempts to find a cure for Oliver's ailment, while Clark tries to find out who is responsible . Tess assigns Lois the job of uncovering the truth about Oliver's "drunken fall" at the fundraiser . While unconscious, Oliver relives the time he was shipwrecked on an island and how he first learned to shoot a bow . He also relives his first meeting with Tess, who was kidnapped while doing marine research in Fiji by a man named Marcos . Clark manages to get an antidote for Oliver, who informs him that Tess will be attacked next . Clark saves Tess before Marcos, who has returned, can kill her . Tess later takes revenge and poisons Marcos before sending him to the hospital to die . </Td> </Tr> <Tr> <Th> 156 </Th> <Td> </Td> <Td> "Instinct" </Td> <Td> Mairzee Almas </Td> <Td> Caroline Dries </Td> <Td> October 9, 2008 (2008 - 10 - 09) </Td> <Td> 3T7453 </Td> <Td> 4.05 </Td> </Tr> <Tr> <Td_colspan="8"> Tess and a scientist activate the crystal that built the Fortress of Solitude, which results in an energy beam being sent into space . An alien, Maxima, from the planet Almerac recognizes the beacon as Kryptonian and comes to Earth to search for the Kryptonian she believes sent for her . Maxima tracks the signal to Tess, and then mistakenly identifies Jimmy as the Kryptonian . Maxima's kiss almost kills Jimmy, but Clark comes to the rescue . Maxima realizing Clark is the Kryptonian she has been looking for, finds Clark at the Daily Planet and she uses her hormone - enhanced kiss to take control over Clark . When Clark tries to comfort Lois, who witnesses the pair kissing, Maxima assumes she is a rival mate and attempts to kill her . Clark stops Maxima and uses her bracelet to send her back to her home planet; he also learns that Tess has his crystal . </Td> </Tr> <Tr> <Th> 157 </Th> <Td> 5 </Td> <Td> "Committed" </Td> <Td> Glen Winter </Td> <Td> Bryan Q. Miller </Td> <Td> October 16, 2008 (2008 - 10 - 16) </Td> <Td> 3T7455 </Td> <Td> 4.18 </Td> </Tr> <Tr> <Td_colspan="8"> Chloe and Jimmy are kidnapped after their engagement party by a jeweler who wants to test their love . Using a lie - detector to quiz them, every time one is caught in a lie the other is punished with a surge of electricity . Clark and Lois discover that they are missing and pose as a couple to lure the kidnapper out of hiding . Chloe and Jimmy survive, answering the questions to the jeweler's satisfaction, who sets them free; unfortunately, Lois is kidnapped by the jeweler . Clark goes to her rescue, but a kryptonite watch the jeweler wears weakens Clark . During the line of questions, Lois admits that she loves Clark . Before Clark can answer, he manages to strip the watch off the jeweler and then knock him unconscious . Later, Lois chalks up her "love" for Clark as nothing more than a lie, which she was able to accomplish by slipping the lie - detector electrode off her finger . </Td> </Tr> <Tr> <Th> 158 </Th> <Td> 6 </Td> <Td> "Prey" </Td> <Td> Michael Rohl </Td> <Td> Kelly Souders & Brian Peterson </Td> <Td> October 23, 2008 (2008 - 10 - 23) </Td> <Td> 377456 </Td> <Td> 4.15 </Td> </Tr> <Tr> <Td_colspan="8"> A serial killer attacks a local club, injuring and murdering several patrons . Clark arrives and discovers Davis's body, covered in blood and lying unconscious on the floor . Davis denies any memory of the event . While looking for clues, Clark meets John Jones, who, since losing his powers, has taken a job as a police detective . John and Clark work together on the attack, with John indicating that there have been others and that Davis has been the first to arrive on each of the scenes . Davis discovers that the blood on his body is not his, and that he has no wounds; Davis starts to believe that he is the killer because he suffers blackouts during the attacks, and finds his skin under the fingernail of a victim . One of Chloe's Isis clients attacks Davis and Jimmy, and after Clark subdues him, the client confesses to all of the murders . John warns Clark that his heroic actions are getting a lot of attention and could expose him to the world, so he needs to be more careful when saving people . </Td> </Tr> <Tr> <Th> 159 </Th> <Td> 7 </Td> <Td> "Identity" </Td> <Td> Mairzee Almas </Td> <Td> Todd Slavkin & Darren Swimmer </Td> <Td> October 30, 2008 (2008 - 10 - 30) </Td> <Td> 3T7457 </Td> <Td> 4.32 </Td> </Tr> <Tr> <Td_colspan="8"> Lois and Jimmy are mugged on the street, and when Jimmy attempts to snap a picture of the mugger he catches a blurred image of Clark saving Lois . Jimmy goes on the hunt to identify the mysterious "Good Samaritan", and Chloe tells Clark that he should use this opportunity to create an alter ego for himself like Oliver has with "Green Arrow". Tess plants a new reporter, Sebastian Kane, at the Daily Planet, who has the ability to steal memories, to find out if Lois stole the crystal . Jimmy's research leads him right to Clark . Having Oliver pose as the Good Samaritan, Clark sets up a scheme and shows Jimmy that he is wrong . Sebastian attempts to kill Lois after discovering that she knows who he is, but Clark intervenes . Chloe visits Sebastian, and when she learns that he knows Clark's secret she uses her abilities to give him a stroke . </Td> </Tr> <Tr> <Th> 160 </Th> <Td> 8 </Td> <Td> "Bloodline" </Td> <Td> Michael Rohl </Td> <Td> Caroline Dries </Td> <Td> November 6, 2008 (2008 - 11 - 06) </Td> <Td> 3T7459 </Td> <Td> 4.45 </Td> </Tr> <Tr> <Td_colspan="8"> Someone sends Clark the crystal to rebuild the Fortress, only, when Clark touches the crystal it activates and sends him and Lois to the Phantom Zone . There, Clark and Lois find Kara, who helps Lois escape back to Earth . Unfortunately, General Zod's wife, Faora, also escapes and takes over Lois's body . Faora sets out to find her son, who turns out to be Davis--Faora explains that he was created when Faora and Zod could not have children . Chloe uses her powers to bring Clark and Kara back to Earth, with Kara getting John Jones's crystal to exorcise Faora from Lois's body . Tess pieces together that Clark was in the Arctic with Lex when he disappeared, while Kara decides to leave Earth in search of Kandor, a city that could possibly house survivors of Krypton . </Td> </Tr> <Tr> <Th> 161 </Th> <Td> 9 </Td> <Td> "Abyss" </Td> <Td> Kevin G. Fair </Td> <Td> Don Whitehead & Holly Henderson </Td> <Td> November 13, 2008 (2008 - 11 - 13) </Td> <Td> 3T7458 </Td> <Td> 3.55 </Td> </Tr> <Tr> <Td_colspan="8"> Chloe's memories begin rapidly disappearing, as Brainiac replaces them with Kryptonian code, with the symbol for "Doom" appearing repeatedly . After Chloe forgets everyone, except Davis, Clark decides he has to use the crystal to rebuild the Fortress of Solitude and have Jor - El restore her memories . However, Clark makes a sole provision, that all of Chloe's knowledge about Clark's true identity be removed . As Jor - El restores her memories, Brainiac leaves Chloe and infects the Fortress, unknown to Clark . With her memories restored, Chloe continues planning her wedding with Jimmy . Davis visits Chloe and confesses his love for her, and that he believes she is marrying the wrong man . </Td> </Tr> <Tr> <Th> 162 </Th> <Td> 10 </Td> <Td> "Bride" </Td> <Td> Jeannot Szwarc </Td> <Td> Al Septien & Turi Meyer </Td> <Td> November 20, 2008 (2008 - 11 - 20) </Td> <Td> 3T7460 </Td> <Td> 4.18 </Td> </Tr> <Tr> <Td_colspan="8"> While Lois organizes Jimmy and Chloe's wedding, Oliver shows up on the Kent farm and informs Clark that Lex is still alive, but he needs Clark's help to find Lex's exact location . Clark declines his immediate assistance, explaining that Chloe no longer knows his secret and would never understand why he could not give her away at her wedding . Traveling to Cuba, Oliver meets Lana Lang, who has also been following Lex's trail . Oliver convinces Lana to come back to Smallville, and she arrives at the wedding interrupting Clark and Lois just as they are about to kiss . A security guard discovers Davis disposing of evidence, but before he can call the police, Davis morphs into a Kryptonian monster and kills him . The monster arrives at the ceremony, where he critically injures Jimmy and kidnaps Chloe; he then takes Chloe to the Fortress of Solitude . Lois decides to leave Smallville to help Jimmy although her real reason is the arrival of Lana and leaves heartbroken . </Td> </Tr> <Tr> <Th> 163 </Th> <Td> 11 </Td> <Td> "Legion" </Td> <Td> Glen Winter </Td> <Td> Geoff Johns </Td> <Td> January 15, 2009 (2009 - 01 - 15) </Td> <Td> 3T7461 </Td> <Td> 4.29 </Td> </Tr> <Tr> <Td_colspan="8"> Clark is attacked by the Persuader in his barn, but before he is killed a trio of superpowered aliens from the 31st Century, called the Legion, shows up and saves him . While inhabiting Chloe's body, Brainiac informs Davis that he will soon become the creature "Doomsday" permanently, and places him in an ice cocoon for the metamorphosis . Rokk, Imra and Garth inform Clark that today is the day he is supposed to destroy Brainiac for good, but the only way for him to do that would be to kill Chloe . Brainiac begins sucking the knowledge from every human mind through the world's computer network when he is attacked by the Legion . Before the Legionnaires can kill Chloe, Clark intervenes and convinces them to focus their powers and pull Brainiac out of Chloe . Afterward, the Legion takes what is left of Brainiac with them back to the future to reprogram him into Brainiac 5, leaving Clark with a Legion ring of his own . </Td> </Tr> <Tr> <Th> 164 </Th> <Td> 12 </Td> <Td> "Bulletproof" </Td> <Td> Morgan Beggs </Td> <Td> Bryan Miller </Td> <Td> January 22, 2009 (2009 - 01 - 22) </Td> <Td> 3T7462 </Td> <Td> 3.85 </Td> </Tr> <Tr> <Td_colspan="8"> John Jones is shot by an unseen assailant while on duty, and Chloe and Clark suspect that the shooter was another police officer . Clark goes undercover as a cop to identify the shooter . Clark discovers that a group of officers are taking the law into their own hands, and killing criminals . The group realize who Clark really is, and frame him for John's attempted murder . Believing that Green Arrow is on to them, the cops attempt to kill him as well . Luckily, Clark's words of encouragement persuade one of the cops, a young Dan Turpin, to turn on the others . With some help from John, who has recovered, Clark is cleared of all charges . Lana informs Tess that Lex inserted a nano - transmitter into her optic nerve so that he could keep an eye on everything she was doing . As retribution, Tess offers Oliver the chance to buy LuthorCorp . </Td> </Tr> <Tr> <Th> 165 </Th> <Td> 13 </Td> <Td> "Power" </Td> <Td> Allison Mack </Td> <Td> Todd Slavkin & Darren Swimmer </Td> <Td> January 29, 2009 (2009 - 01 - 29) </Td> <Td> 3T7463 </Td> <Td> 4.21 </Td> </Tr> <Tr> <Td_colspan="8"> Believing that Lana has been kidnapped, Tess tells Clark that she believes Lex took her . She also informs Clark that the reason Lana left after coming out of her coma was because Lex had her taken into custody when she woke, and forced her to break up with Clark via a video . After Clark talks with Chloe, he realizes that Lana never returned because she was busy plotting her revenge against Lex . Clark and Chloe discover that Lana was not kidnapped, but intends to use Lex's "Prometheus" technology, which harnesses alien DNA to give an individual super-human abilities, on herself . It is a success, and Lana is imbued with super-powers of her own . Later, she tells Clark that he no longer has to worry about her, and that they can work together to make the world a better place . </Td> </Tr> <Tr> <Th> 166 </Th> <Td> 14 </Td> <Td> "Requiem" </Td> <Td> Michael Rohl </Td> <Td> Don Whitehead & Holly Henderson </Td> <Td> February 5, 2009 (2009 - 02 - 05) </Td> <Td> 3T7464 </Td> <Td> 3.93 </Td> </Tr> <Tr> <Td_colspan="8"> Just as Oliver is announcing to the LuthorCorp board of executives that Queen Industries has bought controlling interest in LuthorCorp a bomb detonates in the meeting room . Clark and Lana investigate the bombing and discover that the bomb was made with kryptonite . Lana also discovers that her suit not only gives her strength and speed, but absorbs kryptonite radiation as well . The bombmaker, Winslow Schott, a former Queen Industries employee now under the employ of Lex, plants another bomb on the roof of the Daily Planet . When Lana absorbs the kryptonite in this bomb to deactivate it, she becomes so irradiated that she and Clark can never again be near each other . Clark tracks Lex down, but Lana stops him from doing something he would regret, and Lex's mobile safe - house explodes and kills him . To keep from harming Clark, Lana leaves Smallville, again . </Td> </Tr> <Tr> <Th> 167 </Th> <Td> 15 </Td> <Td> "Infamous" </Td> <Td> Glen Winter </Td> <Td> Caroline Dries </Td> <Td> March 12, 2009 (2009 - 03 - 12) </Td> <Td> 3T7465 </Td> <Td> 3.56 </Td> </Tr> <Tr> <Td_colspan="8"> Lois Lane returns to Smallville and is not happy to see Clark . Linda Lake comes back and threatens to expose Clark's secret if he does not agree to provide her with the inside scoop on all of the "Red - Blue Blur" heroics he performs . Instead, Clark has Lois write his story as a means of controlling the inevitable . In response, Linda announces that Clark is part of an alien invasion, and that he killed Lex Luthor . With the police after him, Clark uses his Legion ring to go back in time and stops Linda from writing her story; Clark destroys the ring afterward . Davis begins taking antipsychotic medication to keep his alien side from coming out . When Linda tries to bring out Doomsday, in an effort to escape from going to prison, Davis keeps the creature from coming by killing her . </Td> </Tr> <Tr> <Th> 168 </Th> <Td> 16 </Td> <Td> "Turbulence" </Td> <Td> Kevin G. Fair </Td> <Td> Al Septien & Turi Meyer </Td> <Td> March 19, 2009 (2009 - 03 - 19) </Td> <Td> 3T7466 </Td> <Td> 3.49 </Td> </Tr> <Tr> <Td_colspan="8"> Clark begins to embrace the idea of a double identity by wearing his blue shirt under his suit, carrying his red jacket in his backpack, and switching into his Red - Blue Blur persona whenever he needs to . Tess orchestrates an elaborate plan to expose Clark's secret, which involves stranding the two of them on a plane on the verge of crashing . Clark manages to get the two to safety without Tess seeing him use his powers . Meanwhile, Jimmy witnesses Davis murdering a man in the hospital, but Davis drugs Jimmy with a hallucinogen to make it appear that he is delusional . After witnessing Chloe and Davis hugging, and having Chloe stun him with a taser before he could hit Davis with a pipe, Jimmy informs Chloe that marrying her was a mistake and he walks out on her . </Td> </Tr> <Tr> <Th> 169 </Th> <Td> 17 </Td> <Td> "Hex" </Td> <Td> Mairzee Almas </Td> <Td> Bryan Miller </Td> <Td> March 26, 2009 (2009 - 03 - 26) </Td> <Td> 3T7467 </Td> <Td> 3.79 </Td> </Tr> <Tr> <Td_colspan="8"> A magician, Zatanna, grants Chloe's wish to have Lois's life, and as a result Chloe wakes up with Lois's body . Chloe informs Clark about what has happened, and the pair track down Zatanna . Chloe learns that to reverse the spell she has to not want the wish any longer; at the same time, Clark inadvertently wishes to have a normal life, which deprives him of the knowledge of his abilities . Zatanna visits Oliver and offers to grant him one wish if he can find her father's book of spells . Oliver gets the book, and Zatanna sets out to resurrect her father with it, which will require her to sacrifice her own life . Clark regains the memory of his alien heritage with help from Chloe, and convinces Zatanna not to sacrifice herself but instead use her gifts to honor her father's memory . </Td> </Tr> <Tr> <Th> 170 </Th> <Td> 18 </Td> <Td> "Eternal" </Td> <Td> James Marshall </Td> <Td> Brian Peterson & Kelly Souders </Td> <Td> April 2, 2009 (2009 - 04 - 02) </Td> <Td> 3T7468 </Td> <Td> 3.84 </Td> </Tr> <Tr> <Td_colspan="8"> After doing some research, Tess informs Davis that he crash landed to Earth in 1989, during the Smallville meteor shower, alongside another boy . She tells Davis that he and Clark Kent are destined to fight and kill each other, and that Clark cannot accept his role as Earth's savior until he kills Davis . Davis remembers that he was hurt by kryptonite as a child, and has Chloe lock him in a tank and drown him in a kryptonite solution until he dies . Tess tries to convince Clark that she knows who he is, and her theory about his needing to kill Davis, but she fails . In the end, Davis returns to life and is now immune to kryptonite; he informs Chloe that her presence is the only thing that keeps Doomsday at bay . It is also revealed that Tess is in possession of the Kryptonian orb that took Clark's powers . </Td> </Tr> <Tr> <Th> 171 </Th> <Td> 19 </Td> <Td> "Stiletto" </Td> <Td> Kevin G. Fair </Td> <Td> Caroline Dries </Td> <Td> April 23, 2009 (2009 - 04 - 23) </Td> <Td> 3T7469 </Td> <Td> 3.10 </Td> </Tr> <Tr> <Td_colspan="8"> After saving Chloe from a carjacker, who turns out to be local mobster, Bruno Mannheim, Lois takes on the superhero persona of "Stiletto", which she uses to get closer to the Red - Blue Blur and convince him to give an interview to "Lois Lane". Jimmy is enlisted to take photos of Lois in her Stiletto costume, but his camera is taken by the mobster, who wants revenge on Stiletto . Clark goes looking for Stiletto, in an effort to track down Chloe's laptop that contains files on Oliver and his team, and discovers that Lois is Stiletto . After lecturing her on faking a story, he tracks down the laptop but is incapacitated by kryptonite . Lois arrives just in time to save Clark . In the end, Lois receives a call from the Red - Blue Blur who informs her that she does not need to fake stories to be a good reporter, and when he is ready to come out to the world she will be the first to know . </Td> </Tr> <Tr> <Th> 172 </Th> <Td> 20 </Td> <Td> "Beast" </Td> <Td> Michael Rohl </Td> <Td> Genevieve Sparling </Td> <Td> April 30, 2009 (2009 - 04 - 30) </Td> <Td> 3T7470 </Td> <Td> 3.23 </Td> </Tr> <Tr> <Td_colspan="8"> Clark begins to suspect that Davis is alive, and when the Metropolis police issue a manhunt for Davis, whom they believe to be a local serial killer, Chloe decides it would be best if they both just left Smallville . Clark informs Chloe that he can send Davis to the Phantom Zone using the crystal from the Fortress of Solitude; hearing this, Chloe lies and tells Clark she thinks Davis could be in Alaska . Clark finds Davis in the process of killing Oliver, but he intervenes and takes Davis to the Fortress . Clark uses the crystal to open the Phantom Zone, but Chloe arrives, removes the crystal, and chastises Clark for giving up on Davis . Chloe and Davis leave the Fortress and Smallville, going off the grid so that Clark and Oliver cannot track them . </Td> </Tr> <Tr> <Th> 173 </Th> <Td> 21 </Td> <Td> "Injustice" </Td> <Td> Tom Welling </Td> <Td> Al Septien & Turi Meyer </Td> <Td> May 7, 2009 (2009 - 05 - 07) </Td> <Td> 3T7471 </Td> <Td> 3.39 </Td> </Tr> <Tr> <Td_colspan="8"> Tess gathers a team of meteor - infected individuals to track Doomsday so that she can give Clark his location, and hopefully convince him to kill Doomsday . One of Tess' team members pretends to be Chloe in order to trick Clark into killing Doomsday . Instead, Tess learns that Clark plans to use black kryptonite to split Davis from his Doomsday persona, and send the beast into the Phantom Zone . As a result, Tess steals the crystal that opens the Phantom Zone and destroys it, all at the request from a disembodied voice claiming to be from Kandor that emanates from the Kryptonian orb she has . Tess informs Clark that now he has no choice but to kill Doomsday . Meanwhile, Oliver confesses to Clark that he killed Lex, which forces Clark to question who Oliver has become if he's willing to take another man's life . </Td> </Tr> <Tr> <Th> 174 </Th> <Td> 22 </Td> <Td> "Doomsday" </Td> <Td> James Marshall </Td> <Td> Brian Peterson & Kelly Souders </Td> <Td> May 14, 2009 (2009 - 05 - 14) </Td> <Td> 3T7472 </Td> <Td> 3.13 </Td> </Tr> <Tr> <Td_colspan="8"> Rokk returns from the 31st Century and informs Clark that Doomsday will kill him, and gives him a new Legion ring to transport Doomsday to the future . Instead, Clark decides to use black kryptonite to split Davis from Doomsday, and bury the beast a mile underground . Tess confronts Lois about stealing the Kryptonian orb, but as the two fight, Lois finds the Legion ring and is transported to another time in history . When Davis starts to change, Chloe uses the black kryptonite to split him herself . Clark battles Doomsday in the streets of Metropolis and manages to bury Doomsday, as planned, using explosives to seal the tunnel . Davis stabs Jimmy when he realizes that Chloe still loves Jimmy, but before he dies Jimmy impales Davis on a metal rod . Clark tells Chloe that it is human - learned emotions that have caused him the most trouble, and vows that "Clark Kent is dead"; the orb returns to Tess and releases Zod . </Td> </Tr> </Table>

When does chloe regain her memory about clark