Episode 86 of "Smallville"
s04e20 Ageless
Title: Ageless
Original Air Date: 05/04/2005 on WB
Director: Steven S. DeKnight
Writer: Steven S. DeKnight
Guest Stars: Frank C. Turner (Mechanic), Pascale Hutton (Susan Gallagher), John Shaw (LuthorCorp Scientist), Colin Ford (Evan (Age 16)), Matt Ellis (Turner Sutherland), Owen Stewart (Evan (Baby)), Elizabeth Stewart (Evan (Baby)), Michael Korsch), Marshall Kaplan (Lex's Aide)
Plot Outline:
Checking out a crater in a cornfield, Clark and Lana discover a baby with no parents and take him back to the Kent farm. However, when the baby, Evan, ages from a newborn to a 7-year-old in less than a day, it becomes clear he is aging at a rapid rate and they turn to Lex for help. Meanwhile, Genevieve suspects Lex has the Chinese Kryptonian artifact and orders Lionel to either recover it...or risk putting Lex in danger of his life.