This is the first time that we learn Tara's surname: Maclay.
In the original script, Joss Whedon had written this in the scene where the team is helping Buffy moving: "Tara is in the closet (no jokes please)".
Steve Rankin and Kevin Rankin, who play Tara's father and brother respectively, are not related in real-life despite sharing a common surname.
Sarah Michelle Gellar starred in Cruel Intentions (1999) and Amy Adams, who guest starred, played in Cruel Intentions 2 (2000) as the same character Gellar played in the original movie.
It is established that Hank Summers "bailed" on his family and Buffy states that he is now in Spain "living the cliche" with his secretary. Only eight years later he'll attempt to reconnect with his daughters in the comic Freaky Giles Day.