Sean Kelvin's name refers to one of three common units of temperature: Fahrenheit, Celsius and Kelvin.
When Clark Kent and Chloe Sullivan first arrive at the party, Chloe is talking about how cold it is out there, to which Clark replies it doesn't feel that cold to him. Chloe's response is, "What? Are you from an ice planet? It's freezing!". A hat tip to the ice planet that Clark is from, Krypton.
According to the Season One companion book the Working title for this episode was "Freeze".
When Clark Kent is about to ask Lana Lang to go to the Radiohead concert, Lana is seen reading a book at the coffee shop. The book was Doctor Zhivago written by the Russian author Boris Pasternak. One of the themes of the novel is loneliness, which aptly reflects the mood Lana was in, before Clark asked her out to the concert.
Clark Kent uses the following abilities in this episode: super strength, super speed, and X-ray vision.