This marks the first episode in which Clark wears a uniform to represent his crime-fighting alter-ego, the Blur, as well as having the modern House of El emblem on his chest. His black uniform with silver emblem is reminiscent of the black Kryptonian costume which Superman wore in the comics after returning from death at the hands of Doomsday. It also resembles the outfit that Jor-El would sometimes wear on Krypton as seen in Superman: The Movie and the Superboy TV series.
When the Kryptonian soldiers kneel before Zod, they place their right arm in front of their body, slightly raised and left arm behind their body, slightly lowered. This forms a 'Z'
Zod orders his soldiers to kneel before Zod. This is Zod's catchphrase, from the comics and the movies.
Adrian Holmes who plays Basqat, played Griff on Smallville in 2006.
When Lois is in the train, the paper is from the night before, even though it has the next day's date.