In the beginning of 'Magnetic', Lex Luthor is discussing the investigation into the murders of Lionel Luthor's parents. His subordinate hands him a document, revealing that Chloe Sullivan has also been investigating the Luthor family history. Above Chloe's name however is a list of other names, some if not all of which are crew members for the show.
When Clark accuses Seth of being able to control Lana's feelings through his magnetic abilities, Seth comments that Lana is "not made of steel" which is a nod to Clark's future moniker of "The Man of Steel".
The colors of the prison cell that Lana is in are the classic Superman colours, red and yellow walls with blue bars.
Clark uses the following abilities in this episode: super strength, super speed, and heat vision.
Seth's power to create and control magnetic fields is similar to that of Cosmic Boy and the Marvel Comics supervillain Magneto.