In the episode, "Redux" there is a reference made to Coast City which was the one-time home of DC Comics super-hero Green Lantern.
The episode "Redux" was filmed after the first season finale, "Tempest", but aired later in season two. Some lines were dubbed in indicating its placement later in season two (such as Lana discussing Clark's secretiveness and Martha working for Lionel Luthor) though those episodes had yet to be filmed.
At a point late in the episode, a shot of the High School mascot is shown... a Crow wearing an "S" in a shield on his chest, and wearing a flowing red cape ala Superman.
Is based on the true story of Briana Stewart, a.k.a. Treva Thorneberry, a con artist who spent most of her twenties pretending to be a teenager with a multitude of aliases.
Redux is an adjective, from the Latin, meaning brought back. In this episode, both Clark and Lana deal with things brought back from their past: Lana discovers for the first time a man that may be her biological father, and Clark meets for the first time his adoptive grandparent.