Smallville (2001–2011)
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Obnoxious athlete Sean Kelvin drowns in an icy, kryptonite-infested lake, and is resurrected with an intense need for body heat. He freezes his old girlfriend to death and sets his sights on Chloe.


James A. Contner (as Jim Contner)


Jerry Siegel (character created by: Superman), Joe Shuster (character created by: Superman) | 3 more credits »

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Episode cast overview:
Tom Welling ... Clark Kent
Kristin Kreuk ... Lana Lang
Michael Rosenbaum ... Lex Luthor
Eric Johnson ... Whitney Fordman
Sam Jones III ... Pete Ross
Allison Mack ... Chloe Sullivan
Annette O'Toole ... Martha Kent
John Schneider ... Jonathan Kent
Michael Coristine Michael Coristine ... Sean Kelvin
Tania Saulnier ... Jenna Barnum
Elizabeth McLaughlin Elizabeth McLaughlin ... Nurse
Ted Garcia Ted Garcia ... News Anchor


In a high school party nearby a frozen lake with kryptonite at the bottom, arrogant football player Sean Kelvin has an accident and drowns under the ice. However, he mysteriously survives with the power and need of taking the heat of other people and freezing things. Meanwhile, the Kents have financial difficulties and need a loan to save their farm, and Lex Luthor invites them for a meeting at his mansion and offers the necessary money in a lower interest rate to the reluctant Jonathan. Sean freezes and kills his girlfriend Jenna Barnum, and invites Chloe Sullivan to date him with the intention to use her body heat for his own survival. Clark, who is going to a Radiohead concert with Lana, quits the date to save his friend first, and his stepparents later, while the jilted and angry Lana returns to the arms of her boyfriend Whitney. Written by Claudio Carvalho, Rio de Janeiro, Brazil

Plot Summary | Add Synopsis


TV-PG | See all certifications »






Release Date:

13 November 2001 (USA) See more »

Company Credits

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Technical Specs


Sound Mix:




Aspect Ratio:

1.78 : 1
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Did You Know?


Sean Kelvin's name refers to one of three common units of temperature: Fahrenheit, Celsius and Kelvin. See more »


When Whitney is about to run down Sean, the rear window of Whitney's vehicle appears to be smashed before they leave the road and crash the car. However, the window is not smashed - it has water droplets on it giving it a shimmer, just like the driver's door window. See more »


Jonathan Kent: We already talked about that.
Martha Kent: I talked, you grunted.
Jonathan Kent: I thought that I was rather articulate.
See more »


References The Lost Boys (1987) See more »


Standing Still
Written by Jewel Kilcher and Rick Nowels
Performed by Jewel Kilcher
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User Reviews

Too Cool for School!
9 August 2010 | by JeriqueSee all my reviews

Perhaps my most favourite episode from the entire series, or at least the first season, is Cool. Why? There's so much about it that is great. I love the villain of Sean who becomes a hypothermic homicidal maniac, when he can't stay warm and needs bodyheat from others to get his normal coloring back.

It shows off some really great visual effects for the most part, while still showing off some of the previously seen special effects, as well. I especially like the photography used in the scene where Sean passes by some lit candles and as soon as he passes, they become a solid piece of ice flame.

Lana's relationship with Clark develops a bit more while Lex's relationship with Jonathan Kent crumbles more so. It's great to watch the dramatic stuff in the episode as much as the thrilling action. I especially like the line of "a high school boyfriend is not a husband, he's an obstacle," from the voice of Lex.

As Lex tries to prove that he genuinely cares about the Kents, Jonathan and Martha continue to have their suspicions (mostly, Clark's dad). I do enjoy the rest of the episode's flawless acting, amazing special and visual effects, and awesome storyline.

I love this episode and it's my favourite episode from the first season, definitely. There's nothing bad about this episode. Perhaps the best part of the episode comes from watching Shawn change the pool into a lake of pure ice and then watching Clark, with ease, punch a hole into it. Great episode!

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