Jill Hennessy recorded songs for the show's soundtrack.
The launch of the third season was delayed for about half a year to accommodate Jill Hennessy's real-life pregnancy.
Executive producer and creator Tim Kring was at first reluctant to cast Jill Hennessy as the impulsive, abrasive medical examiner Jordan Cavanaugh, knowing only her work as the straight-laced Assistant D.A. Claire Kincaid on Law & Order and as Jackie Kennedy in Jackie, Ethel, Joan: The Women of Camelot (2001) (TV). Agreeing to meet for breakfast, Kring was embarrassed to discover the restaurant he had chosen was closed when they arrived. Kring started to apologize, but Hennessy, unfazed, said, "Dude, who gives a shit? We'll go someplace else." Kring recalled thinking, "Oh, my God, this is Jordan."
Nigel mentions having a blog on the internet at www.nigelblog.com. The web address lead at one point to a blog website with information about cases. It currently redirects to the Universal Pictures website.
Jill Hennessy is such a fan of the folk duo Indigo Girls that a poster of the act hangs in the kitchen set of her character.
Both Miguel Ferrer and Jill Hennessy played in Robocop films: Ferrer appeared in RoboCop as Robert 'Bob' Morton, the OCP executive who built Robocop; Hennessy played in RoboCop 3 Dr. Marie Lazarus, OCP technician who fixed Robocop after he was severely damaged.
The episodes "Prisoner Exchange" and "There's No Place Like Home" both feature songs performed by Rosemary Clooney, mother of series regular Miguel Ferrer.
The photograph on Macy's (Miguel Ferrer) desk is actually a picture of the actor himself and his real mother, Rosemary Clooney.
This episode was part of NBC's 75th Anniversary celebration, in which actors from previous NBC shows guest starred in current ones.
In the first season finale, at the end as Dr. Macy tries to persuade Lilly to stay, the people lined up to get on the bus were the extras throughout season one who played the dead bodies.
A 90 minute episode.
This episode was actually a pilot for a spin-off series about Det. Hoyt ('Jerry OConnell) working in Los Angeles. But it was not picked up.
The first episode of the series not to include Jill Hennessey.
Nigel identifies a paint chip from a dead suspect's shoe as "...having been specially formulated for the now-defunct Swann-Flanders Construction Company". This is an apt thing for Brit Nigel to say. The team of Michael Flanders and Donald Swann were one of England's most popular musical teams through the '60s, composing songs and light opera. Best known for their comic revues "At the Drop of a Hat" and "At the Drop of Another Hat", they also composed music for many poems written by J.R.R. Tolkien which appeared in "The Hobbit", "The Lord of the Rings" and other of his works.
This episode was a crossover episode with "Las Vegas" (2003) {Two of a Kind (#2.8)}. Sam Marquez (Vanessa Marcil) and Danny McCoy (Josh Duhamel) play the same character on both shows.