THE 90-MINUTE SEASON FINALE IS PACKED WITH MURDER, BETRAYAL AND AN UNFORGETTABLE GRADUATION DAY FOR ALL – 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.
GENEVIEVE ATTACKS LANA TO GET THE CRYSTAL – 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.
CLARK AND LANA FIND AN ABANDONED BABY IN THE CORNFIELD – 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.
SUPERDOG TO THE RESCUE – 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.
LANA IS ATTACKED AND ALL FINGERS POINT TO ALICIA – 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.
JANE SEYMOUR GUEST-STARS – 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.