Semple's mother mentions the "other boy" E.A.D.A. Jack McCoy and A.D.A. Abbie Carmichael prosecuted who "shot that delivery man." She is referring to Mitch Regan, the oldest of the thrill killers from a previous episode (Teenage Wasteland (2001), Episode 11.12).
Robert Emmet Lunney played five different characters over the course of the series:
- Episode 3.11 Extended Family (1993) - Harold Zorn (as Robert Emmet).
- Episode 6.21 Pro Se (1996) - Frank Ellis (as Robert Emmet).
- Episode 10.13 Panic (2000) - Dr. Samuel Bookman.
- Episode 11.22 School Daze (2001) - Bill Semple.
- Episode 17.3 Home Sweet (2006) - Miles Schaffner.
Nancy Ticotin portrayed four different characters over the course of the series:
- Episode 3.15 Mother Love (1993) - Miss Gomez.
- Episode 7.5 Corruption (1996) - Club Bahia Hostess.
- Episode 11.8 Thin Ice (2000) - Alma Nogales.
- Episode 11.14 A Losing Season (2001) - Detective Reina Perez.
- Episode 11.15 Swept Away - A Very Special Episode (2001) - Detective Reina Perez.
- Episode 11.17 Ego (2001) - Detective Reina Perez.
- Episode 11.20 All My Children (2001) - Detective Reina Perez.
- Episode 11.22 School Daze (2001) - Detective Reina Perez.
- Episode 11.24 Deep Vote (2001) - Detective Reina Perez.
This episode appears to be based on several high-profile school shootings that occurred in the late 1990s in particular the 1999 Columbine High School massacre committed by Eric Harris and Dylan Klebold.