4.01 Crusade Airdate: September 22, 2004 Written by: Alfred Gough, Miles Millar Directed by: Greg Beeman Clark (Tom Welling) returns to Smallville re-programmed as Kal-El. Intent on fulfilling his destiny, Kal-El takes to the skies to steal a powerful Kryptonite crystal. Determined to save her son, Martha (Annette O'Toole) turns to Dr. Swann's emissary, Bridgette Crosby, and learns about a surprising new form of Kyptonite. Meanwhile, Lois Lane (Erica Durance) comes to town to investigate the murder of her cousin Chloe (Allison Mack). Also, Lana (Kristin Kreuk) returns from Paris with a new attitude and a new boyfriend, Jonathan (John Schneider) lies in a coma, and Lionel (John Glover) faces a grim new life in prison. Guest Stars: Erica Durance (as Lois Lane); Margot Kidder (as Bridgette Crosby) Featured Music: Better Days Will Come by Tahiti 80; Plus Pres De Moi by San Drine

                                                          

4.02 Gone Airdate: September 29, 2004 Written by: Brian Peterson & Kelly Souders Directed by: James Marshall Clark (Tom Welling) and Lois Lane (Erica Durance) investigate Chloe's (Allison Mack) apparent murder, but are stopped by an army officer, General Sam Lane (guest star Michael Ironside), who turns out to be Lois' father. Lois suspects that Sam knows more about Chloe's death than he will admit, and Clark discovers that Sam has recently been in contact with Lex (Michael Rosembaum). Jason (Jensen Ackles) arrives from Paris and convinces Lana (Kristin Kreuk) to continue their relationship. Suspecting that Chloe is still alive, Lionel (John Glover) sends an assassin with the power to morph his limbs into metallic weapons to keep Chloe from testifying against him. Guest Stars: Erica Durance (as Lois Lane) Michael Ironside (as General Sam Lane) Featured Music: Flower Duet by Dame Joan Sutherland/Jane Berbie; Faraway by Dara Shindler; She Will Be Loved (Acoustic Version) by Maroon 5

                                                          

4.03 Facade Airdate: October 06, 2004 Written by: Holly Harold Directed by: David Carson Clark (Tom Welling) faces a surprising new foe in the form of a shy high school girl (guest star Brianna Lynn Brown) who turns to plastic surgery to enhance her looks and boost her popularity. However, things go awry when she discovers that her Kryptonite - enhanced beauty causes harm to anyone she kisses - and she decides her next victim will be Lana (Kristin Kreuk). Meanwhile, Jason (Jensen Ackles) and Lana continue to hide their relationship from Clark. Guest Stars: Erica Durance (as Lois Lane) Abigail (as Brianna Lynn Brown) Featured Music: Devils And Angels by Toby Lightman; **** N'Spend by High Speed Scene; What Do You Do In The Summer (When It's Raining) by Beu Sisters; Ghetto by John Gold; My Happy Ending by Avril Lavigne

                                                          

4.04 Devoted Airdate: October 13, 2004 Written by: Luke Schelhaas Directed by: David Carson Clark (Tom Welling) joins the football team at school and is immediately given the starting quarterback position after the old quarterback starts a fight with new coach Jason. (Jensen Teague) Curious about the behavior change in his old teammate, Clark and Lois (Erica Durance) investigate and discover that the cheerleaders are poisoning the teams' water with Kryptonite, turning the players into Stepford-like boyfriends. Guest Stars: Erica Durance (as Lois Lane), Moneca Delain (Mara), Amanda Walsh (Mandy) Featured Music: Better Off By Myself by Bosshouse; Revolution by Authority Zero; California by Hawk Nelson; Medicated by Sub Space Radio; Meltdown by Ash; On The Run by Sam Roberts; Disco MF by The Penfifteen Club; Our Myster by Bebo Norman

                                                          

4.05 Run Airdate: October 20, 2004 Written by: Steven S. DeKnight Directed by: David Barrett After Jonathan's (John Schneider) wallet is stolen, Clark (Tom Welling) super-speeds after the thief but is stunned when he cannot catch him. The thief, Bart, a.k.a. The Flash, later shows up at the farm and tries to talk Clark into leaving Smallville for a life on the road together, flexing their super powers. Meanwhile, Lex (Michael Rosenbaum) buys a priceless framed manuscript with Kryptonian symbols and Clark learns that it contains a mysterious hidden map. However, when Bart steals the manuscript from Lex, he inadvertently puts Clark's life in danger and must make the decision whether to save Clark or himself. Guest Stars: Kyle Gallner (as Bart Allen) Featured Music: Don't Say Nuthin' by The Roots; Welcome To My World by Kyle Newacheck; Cruel Sun by Silver; Feels Like Today by Rascal Flatts

                                                          

4.06 Transference Airdate: October 27, 2004 Written by: Todd Slavkin & Darren Swimmer Directed by: James Marshall Clark (Tom Welling) hears a painful ringing sound in his ears and is drawn to the prison where Lionel (John Glover) is being held. When he sees Lionel attempt to stab Lex with a strange glowing stone, Clark grabs for the stone causing the two men to switch bodies. Learning his new body has super powers, Lionel immediately begins wreaking havoc on Smallville. Trapped behind bars without his powers, Clark must figure out a way to get his body and powers back in order to save his friends and family. Guest Stars: J.P. Manoux (as Edgar) Margot Kidder (as Bridgette Crosby) Featured Music: Pain by Jimmy Eat World

                                                          

4.07 Jinx Airdate: November 3, 2004 Written by: Mark Warshaw Directed by: Paul Shapiro Chloe (Allison Mack) is drawn into an underground gambling ring at school run by foreign exchange student Mikail Mxyzptlk (guest star Trent Ford) and loses her savings on a football game after Mxyzptlk uses his powers to control all the players including Clark (Tom Welling). When Chloe discovers Mxyzptlk's secret, he kidnaps her and threatens to kill her unless Clark throws the championship game. Meanwhile, Lex (Michael Rosenbaum) threatens Mxyzptlk with deportation unless he uses his powers for Lex's benefit. Guest Stars: Trent Ford (as Mikail Mxyzptlk) Featured Music: Walk Idiot Walk by The Hives; I Believe by Shiloh; Fall Behind Me by The Donnas; I'm All Gond by Bosshouse; Boulevard Of Broken Dreams by Green Day; Reach For The Sky by Social Distortion

                                                          

4.08 Spell Airdate: November 10, 2004 Written by: Steven S. DeKnight Directed by: Jeannot Szwarc After Lana (Kristin Kreuk) reads from a spell book written in the 1600s, she, Lois (Erica Durance) and Chloe (Allison Mack) become possessed by witches that had been burned at the stake. The three witches have come back seek revenge and search for the powerful Kryptonian crystals, wreaking havoc on the town in the process. Clark attempts to stop the witches but they strip him of his powers and force him to reveal the location of the crystal he hid in the cave. Guest Stars: Erica Durance (as Lois Lane) Featured Music: Blame by Black Toast Music; What You Waiting For by Gwen Stefani; We Might As Well Be Strangers by Keane

                                                          

4.09 Bound Airdate: November 17, 2004 Written by: Luke Schelhaas Directed by: Terrence O'Hara Lex (Michael Rosenbaum) is accused of killing a young woman and suspects that Lionel (John Glover) is behind it. Lionel, whose liver has miraculously healed, claims to be a new man and aids Clark (Tom Welling) in finding the person responsible for framing Lex. Meanwhile, Jason's (Jensen Ackles) mother, Genevieve (Jane Seymour), comes to town to visit her son and his new girlfriend. Jason suspects her motives and worries that his seemingly accidental meeting with Lana (Kristin Kreuk) in Paris might have been all a set up by his mother. Guest Stars: Erica Durance (as Lois Lane), Jane Seymour (as Genevieve Teague), Claudette Mink (as Corrine Hartford), Cobie Smulders (as Shannon Bell) Featured Music: I Want More Part 2 by Faithless; Daddy's Little Girl by Amanda O'Connor

                                                          

4.10 Scare Airdate: December 1, 2004 Written by: Kelly Souders, Brian Peterson Directed by: David Carson A LuthorCorp experiment is released into the atmosphere - a toxin that causes its victims to hallucinate their worst fear. Chloe (Allison Mack), Clark (Tom Welling), Lana (Kristin Kreuk), and Jason (Jensen Ackles) all fall victim to the toxin, and Lex, desperate to find a cure, takes a dangerous antidote. Meanwhile, Lionel (John Glover) is released from prison and his conviction overturned thanks to a mysterious benefactor. Guest Stars: Malcolm Stewart (as Dr. Otis Ford), Jerry Wasserman (as Dr. Scanlan), Samantha Ferris (as Warden Stall) Featured Music: Falling by Mindy Smith

                                                          

4.11 Unsafe Airdate: January 26, 2005 Written by: Steven S. DeKnight, Jeph Loeb Directed by: Greg Beeman Claiming to be cured, Alicia Baker (Sarah Carter) is released from Belle Reve hospital and comes to Smallville to rekindle her relationship with Clark (Tom Welling). Initially skeptical, Clark finds himself enjoying dating someone who knows his secret, but when she pushes for more, he hesitates, causing her to use red Kryptonite on him. Clark, under the influence of red Kryptonite, whisks Alicia off to get married in Las Vegas. Meanwhile, Lana (Kristin Kreuk) ponders whether or not to take her relationship with Jason (Jensen Ackles) to the next level in order to win him back. Lex (John Glover) is unimpressed with Lionel's (John Glover) claims of being a changed man. Guest Stars: Sarah Carter (as Alicia Baker), John Pyper-Ferguson (as Dr. William McBride) Featured Music: Laura by Scissor Sisters; Beautiful Soul by Jesse McCartney; Life For Rent by Dido; Welcome To My Life by Simple Plan; It's Now Or Never by Elvis Presley; Funny Little Feeling by Rock N Roll Soldiers; Break So Easy by Johnathan Rice

                                                          

4.12 Pariah Airdate: February 2, 2005 Written by: Holly Harold Directed by: Paul Shapiro When a mysterious killer strikes at both Lana (Kristin Kreuk) and Jason (Jensen Ackles), Alicia (Sarah Carter) is the leading suspect and even Clark (Tom Welling) comes to doubt her innocence. Feeling betrayed, she secretly tricks Clark into revealing his powers in front of one of his friends. And Genevieve (Jane Seymour) returns to town with an offer for Lex (Michael Rosenbaum), who in turn has an offer for Jason. Guest Stars: Erica Durance (as Lois Lane), Jane Seymour (as Genevieve Teague), Camille Mitchell (as Sheriff Adams), Sarah Carter (as Alicia Baker), Derek Hamilton (as Tim Westcott) Featured Music: I Love Rock N’ Roll by Joan Jett And The Blackhearts; To Die For by Dan Zweben; Deeper Water by Minnie Driver

                                                          

4.13 Recruit Airdate: February 9, 2005 Written by: Todd Slavkin, Darren Swimmer Directed by: Jeannot Szwarc Clark (Tom Welling) is approached by Metropolis University for a football scholarship and meets Geoff, a former outstanding Smallville High player who gives Clark a taste of the luxurious life as a football star. However, Geoff is revealed to be a meteor freak and is secretly using his abilities to gain an unfair advantage on the field. Clark reconsiders his plans to pursue football in college. Meanwhile, Lana (Kristin Kreuk) gets upset over Lex's (Michael Rosenbaum) investigation into Genevieve (Jane Seymour). She confronts Lex, who gives her a reason to reconsider her trust for the Teagues. Guest Stars: Erica Durance (as Lois Lane), Chris Carmack (as Geoff Johns), John Novak (as Coach Quigley), Colby Johannson (as Coop) Featured Music: Wonderful Night by Fatboy Slim; It's All Behind by Anthony Michaelangelo; Finding Out True Love Is Blind by Louis XIV; Wild West Show by Big $ Rich; Untitled by Simple Plan

                                                          

4.14 Krypto Airdate: February 16, 2005 Written by: Luke Schelhaas Directed by: James Marshall Lois (Erica Durance) accidentally hits a dog and brings it back to the farm to heal, but Clark (Tom Welling) quickly realizes it has super-strength. He investigates and discovers it was part of an aborted LuthorCorp experiment...and that robbers are using the dogs to help them steal money. Meanwhile, Lana (Kristin Kreuk) wonders what Jason (Jensen Ackles) is up to with his mother, and Jason is forced to ask Genevieve (Jane Seymour) a few questions of his own. Guest Stars: Erica Durance (as Lois Lane), Jane Seymour (as Genevieve Teague), Bud (as Shelby the dog), Nolan Funk (as Zack Greenfield), Diego Klattenhoff (as Josh Greenfield), Alex Green (as Dr. Klein) Featured Music: Anodyne by Speechwriters LLC; Give A Little Bit by The Goo Goo Dolls

                                                          

4.15 Sacred Airdate: February 23, 2005 Written by: Kelly Souders and Brian Peterson Directed by: Brad Turner After Clark (Tom Welling) receives a message from the recently-deceased Dr. Swann, he and Lana (Kristin Kreuk) follow Jason (Jensen Ackles) and Lex (Michael Rosenbaum) to China in search of one of the Kryptonian Crystals. Lana is tortured, causing Isobel to emerge and wreak havoc in her search for the crystal. Guest Stars: Michelle Goh (as Professor Sen), Terence Stamp (as the voice of Jor-El)

                                                          

4.16 Lucy Airdate: March 2, 2005 Written by: Neil Sadhu, Daniel Sulzberg Directed by: David Barrett Lucy Lane, Lois' (Erica Durance) younger sister, comes to Smallville but Clark (Tom Welling) catches her stealing money from the Talon to pay off a European crime syndicate. Lex (Michael Rosenbaum) offers to help but everything is not what it seems. Meanwhile, a thief breaks into Lana's (Kristin Kreuk) apartment and steals the crystal, and Jason (Jensen Ackles) suspects Lionel (John Glover). Guest Stars: Erica Durance (as Lois Lane), Peyton List (as Lucy Lane), Peter Wingfield (as Marcus Becker) Featured Music: Club Foot by Kasabian; I Hold On by Newcomers Home; Spaghetti Streetwalker by Speechwriters LLC; Fly by Mark Joseph

                                                          

4.17 Onyx Airdate: April 13, 2005 Written by: Steven S. DeKnight Directed by: Terrence O'Hara A black Kryptonite explosion splits Lex (Michael Rosenbaum) in two and his evil side - Alexander - is released. Alexander imprisons Lex in the mansion then gives full vent to his evil side - he threatens to evict Lana (Kristin Kreuk) from the Talon unless she becomes his mate, jousts with Lionel (John Glover) , and tries to kill Clark (Tom Welling) and Chloe (Allison mack) when they figure out his secret. Guest Stars: Rekha Sharma (as Dr. Harden), Malcolm Stewart (as Dr. Sinclair), Carra Maureen (as fencing instructor) Featured Music: I Drive Alone by Esthero

                                                          

4.18 Spirit Airdate: April 20, 2005 Written by: Luke Schelhaas Directed by: Whitney Ransick On the eve of the Smallville High School Prom, stuck-up candidate for Prom Queen Dawn Stiles is pulled into a coma when she crashes her car into a ravine filled with kryptonite. While her body lies in a coma, Dawn finds that her spirit can possess the bodies of others. To continue her quest to become Prom Queen, Dawn possesses the bodies of Martha (Annette O'Toole), Lana (Kristin Kreuk), Lois (Erica Durance), and Chloe (Allison Mack) in turn, leaving Clark bewildered at the abrupt personality change of his family and friends. Guest Stars: Erica Durance (as Lois Lane), Camille Mitchell (as Sheriff Adams), Beatrice Rosen (as Dawn Stiles), Jesse Hutch (as Billy Durden), Kandyse McClure (as Harmony), Lifehouse band (as themselves) Featured Music: Come Back Down by Lifehouse; Higher Mathematics by Split Habit; Good To Know by Tim Cullen; La La by Ashlee Simpson; Not Gonna Wait by Lamar; Blind by Lifehouse; Undone by Lifehouse; You And Me (wedding version) by Lifehouse

                                                          

4.19 Blank Airdate: April 27, 2005 Written by: Brian Peterson, Kelly Souders Directed by: Jeannot Szwarc Kevin, a boy who has the power to wipe out people's memories temporarily, turns his powers on Clark (Tom Welling) and accidentally causes him to have total amnesia. Chloe (Allison Mack) looks after him and teaches him about his superpowers while simultaneously trying to keep them secret. On his trip down memory lane, Clark meets Lana (Kristin Kreuk) and falls in love all over again. Lex (Michael Rosenbaum) takes advantage of the situation and attempts to unravel some secrets. Guest Stars: Erica Durance (as Lois Lane), Camille Mitchell (as Sheriff Adams), Jonathan Bennett (as Kevin Grady), Tom Butler (as Mr. Grady) Featured Music: 24 by Jem; Satie by Paco; Let Me Go by 3 Doors Down; This Is Your Life by Switchfoot

                                                          

4.20 Ageless Airdate: May 4, 2005 Written by: Steven S. DeKnight Directed by: Steven S. DeKnight Clark (Tom Welling) and Lana (Kristin Kreuk) discover an abandoned baby in a field and take him back to the Kent farm. However, when the baby ages from a newborn to a 7-year-old in less than a day, it becomes clear he is aging at an abnormally rapid rate and they turn to Lex (Michael Rosenbaum) for help. Meanwhile, Genevieve (Jane Seymour) suspects Lex has the Kryptonian artifact from China and threatens Lionel (John Glover) to either recover it, or risk putting Lex's life in danger. Guest Stars: Jane Seymour (as Genevieve Teague), Camille Mitchell (as Sheriff Adams), Jeff Ballard (as Evan - age 7), Colin Ford (as Evan - age 16), Pascale Hutton (as Susan Gallagher), Matt Ellis (as Tanner Sutherland)

                                                          

4.21 Forever Airdate: May 11, 2005 Written by: Brian Peterson, Kelly Souders Directed by: James Marshall Clark (Tom Welling) must stop the school photographer after he sets up a fake high school and uses his ability to petrify people to kidnap students - including Chloe (Allison Mack) and Lana (Kristin Kreuk) - to keep the glory days of high school going forever. Meanwhile, Lex (Michael Rosenbaum) and Lionel (John Glover) are kidnapped and tortured by the Teagues in an effort to find the Kryptonian artifact. Guest Stars: Erica Durance (as Lois Lane), Jane Seymour (as Genevieve Teague), Steven Grayhm (as Brandon Nash), Fiona Scott (as Haley Timmonds), Chad Krowchuk (as Wendell Johnson), Stephanie Nudd (as Deliah Watkins) Featured Music: Ms. Vandersanden by Split Habit; On The Down by Tim Cullen; Around The Way by Wonderlife

                                                          

4.22 Commencement Airdate: May 18, 2005 Written by: Todd Slavkin, Darren Swimmer Directed by: Greg Beeman Clark's (Tom Welling) high school graduation ceremony is interrupted by a second meteor shower that hits Smallville. Clark goes to the caves to confront his father Jor-El, who says that if Clark does not reunite the three Kryptonian crystals, Earth will be annihilated. Meanwhile, Lex (Michael Rosenbaum) helps Lana (Kristin Kreuk), out of a bloody situation she finds herself in. His motives, however, are not solely in her best interests. As disaster looms, Chloe (Allison Mack) and Lois (Erica Durance) try to find Lana while Clark attempts to reassemble the stones, and someone makes an unexpected return to make things unpleasant for the Kents. Guest Stars: Erica Durance (as Lois Lane), Jane Seymour (as Genevieve Teague), Terence Stamp (as the voice of Jor-El)