Watch Smallville S01e (5) ⟶ «Original»

The episode features the primary series regulars and specific guest stars: Tom Welling The young hero struggling with responsibility Lana Lang Kristin Kreuk Clark's romantic interest Lex Luthor Michael Rosenbaum The billionaire heir trying to befriend Clark Sean Kelvin Michael Coristine The episode's antagonist with freezing powers Chloe Sullivan Allison Mack Clark's friend and investigative reporter Jenna Barnum Tania Saulnier Sean's first victim and classmate Key Trivia & Production Details

This episode establishes Lex's early role as a mentor to Clark , famously advising him that "a high school boyfriend is not a husband, he's an obstacle". Watch Smallville S01E (5)

The episode centers on , a high school athlete who falls into an icy, kryptonite-filled lake. He survives but emerges with a dangerous condition: permanent hypothermia that forces him to absorb the body heat of others to stay alive, effectively freezing them to death. The episode features the primary series regulars and