At the end, when Clark is visiting the graveyard, there is another grave shown with the name 'Allison Dunn' on it, which is the name of Smallville's set decorator.
Sarah Carter later played a character loosely based on Allison Mack in the Law & Order: Special Victims Unit (1999) episode "Accredo (2018)". Accredo is itself loosely based on NXIVM, a multi-level marketing company that has been described as both a cult and a Ponzi scheme, of which Kristin Kreuk had also briefly been a member. In April 2019, Mack pled guilty to charges of racketeering.
In the closing scene, one of the tombstones reads "James Marshall - Died from inflexibility" James Marshall directed several episodes of Smallville.
Erica Durance (Lois Lane) had a fairly large role in this episode but was neither listed in the opening nor closing credits.
This episode has some deleted scenes on the Season 4 DVDs: Clark and Alicia are on their way to the Talon. She is apprehensive, but he is trying to assure her that the evening will be fun. And Jason confronts Alicia about Lana's attack.