The ending scene is very similar to how in Superman: The Movie a young Clark throws the kryptonian crystal into the arctic, where it forms his Fortress of Solitude.
Smallville has now installed an emergency siren system which did not appear to have been in place when the tornadoes hit in the season 1 finale.
Lois mentions she can't spell, a trait her comic and film counterparts also share.
This is the last appearance of Jensen Ackles as Jason Teague. It was his first and last season. It is also the last appearance of Jane Seymour as Genevieve Teague.
Lex reveals two years later in "Wrath" that the date of the second meteor shower is May 18, 2005, the day that this episode originally aired.