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 marks the first of many times Clark must sacrifice his personal happiness and budding relationship with Lana to fulfill his duty as a protector. Watch Smallville S01E (5)
Critics noted the impressive visual effects for its time, particularly the "ice flame" scene where candles freeze instantly as Sean passes them. The episode features the primary series regulars and
Clark is faced with a major dilemma when he has to choose between a long-awaited date with Lana Lang—secured with concert tickets provided by Lex—and saving Chloe Sullivan from Sean's deadly touch. "Cool" is often cited as a solid example
"Cool" is often cited as a solid example of the show's early formula. While some reviewers felt the villain lacked depth compared to others, many praised the "slow burn" of the overarching plot involving Lex's true motivations and the Kents' financial struggles. According to ratings on sites like IMDb , the episode is well-regarded for its atmosphere and character progression. Smallville: Season 1, Episode 5 | Cast and Crew
In classic comic book fashion, the villain's name, Sean Kelvin , is a direct nod to the Kelvin temperature scale.