Damon (Ian Somerhalder) is seen reading one of the Twilight books. In 2015, Ian Somerhalder married Nikki Reed, who played Rosalie Hale in the Twilight Saga movies.
Given that most of the principle characters are high school students, there is a lot of under age drinking of champagne at the Founders Party.
This episode marks the first appearance of Marguerite MacIntyre as Caroline's mother, Sheriff Liz Forbes. Marguerite MacIntyre also stars as Kyle's adoptive mother, Nicole Trager, on Kyle XY.
This is probably because both Brian Young(Executive Producer/Writer on The Vampire Diaries) and Julie Plec(Executive Producer/Writer on The Vampire Diaries) worked on Kyle XY together as writers and producers.